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GMC Sierra Brake Controller

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Brake Controller for GMC Sierra

Brake controllers with a custom fit wiring harness for your GMC Sierra make trailer towing safer and installation easier. We offer high quality controllers in both time-delay and proportional models, from manufacturers such as Tekonsha, Hopkins, Valley, and Draw-Tite. Brake controller wiring adapters are available for most <%=fMake%> GMC Sierras, allowing for simple plug-and-play installation.




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GMC Sierra Brake Controller Videos



Trailer Brake Controller Installation - 2012 GMC Sierra

Today on our 2012 GMC Sierra, well be installing the Tekonsha Prodigy P2 Brake Controller, Part Number 90885. To begin the install, well first go ahead and locate the manufacture's brake controller pigtail. This pigtail will be taped to the main wiring harness near the brake pedal. Once we locate the wiring, well go ahead and pull it down to gain access to it. Now, there are a total of five wires. However, we will not be using the orange wire, just the red with the black tracer, blue with the white tracer, and white wire. Now, well go ahead and pull the wires down, and cut them out evenly the length. Then well strip each one of them back, and add a butt connector supply with the brake controller. Now, with butt connectors on the manufacture side, well bring in the brake control pigtail, which is supply with the brake controller, and start connecting our wires.



Trailer Brake Controller Installation - 2005 GMC Sierra

Alright today on this 2005 GMC Sierra, we are going to install part number 90885, the Prodigy P2 brake controller and part number 3015-P, the brake controller adapter. First step that we need to do is to remove this cover for access to the port that is behind here. So we will undo this nut and pop the cover off. We will take our cord and just plug it into place. Moving on, we will reinstall the cover and then put the nut back into place. Alright next we will go ahead and install our brake controller bracket and we are going to do that on a sheet metal at the bottom of the dash here.



Trailer Brake Controller Installation - 2008 GMC Sierra

Today we are going to be installing a brake controller on this 2008 GMC Sierra. The part number is 5520, along with the 7-way replacement socket for the GM products, part number PK11916. We are going to start in the rear, installing the 7-Pole replacement socket. We are back behind the bumper here and if you can see this unit here is actually the 7-pole factory socket that we are going to be plugging into. So we want to go ahead and disconnect this off of the knockout that goes into the bumper. We are back on the outside of the bumper here and this knockout here is actually going to be removed. This is where the PK11916 is going to be put in place of. Now that the knockout is removed, we want to go ahead and put the replacement socket in there. It just slides in and you want to line up the notches and just rotate it and it locks right into place. I am going to take the socket that we removed from the backside of the knockout earlier and plug it into the back of the 7-way here.





GMC Sierra Brake Controller Questions and Answers


  • Brake Controller Installation in 2000 GMC Sierra 1500 SLE
  • The term CHMSL stands for Center High-Mount Stop Light and this is one means to obtain the required brake light signal needed to trigger a brake controller. In the case of your 2000 Sierra if it has the tow package there is a dedicated port under the dash where you can connect your Voyager with a pre-wired harness. You can use part # 3025-P to plug in your Voyager to the port. The linked article illustrates. If you truck does not have factory 7-way you will hard wire your controller...
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  • Troubleshooting a Prodigy P2 Brake Controller on a 2008 GMC Sierra
  • Since you have already had the brake controller replaced and the wires have been soldered, I recommend checking your 7 way connector at the back of your 2008 GMC Sierra. You will want to make sure that it is free of moisture and corrosion. If the connector is showing signs of wear, I suggest replacing it with the Pollak 7 Pole Trailer Connector, # PK11916. I would also check the wiring for your 7 way connector to make sure that none of the wires have been pinched, damaged, or have come loose.
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  • Troubleshooting a Curt Venturer Brake Controller # C51110 on 2008 GMC Sierra with Towing Package
  • I recommend checking to see if you also have an orange wire under the dash of your 2008 GMC Sierra. If there is an orange under there, try connecting the red wire from the Curt Venturer Brake Controller, # C51110, to that wire. I am attaching a chart that shows the other connections for the controller. I would double check that each connection is correct and secure. If you are still having problems, I would use a circuit tester like the Quickee Circuit Tester, # 3808, to test the light...
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  • How to Wire in a Tekonsha Voyager Brake Controller in a 2009 GMC Sierra
  • On your 2009 GMC Sierra, below the steering column, there is a bundle of wires tied together with white tape, located left of the brake pedal. This bundle of wires is the tow package for the brake controller. Carefully cut the white tape binding the wires, and pull the wires down from underneath the steering column. Red from your vehicle will go to the black of the Tekonsha Voyager brake controller # 39510. Dark blue from your vehicle will go to the blue of the brake controller. Light...
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  • Tekonsha Prodigy Trailer Brake Controller Flashes SH
  • If you are seeing H5 then the controller must be upside down because it is likely SH which indicates a short. If the controller is upside down it needs to be turned the other way for proper operation. The likely cause of a short is a dirty or corroded trailer connector on the vehicle or trailer. You will need to make sure there is no dirt or corrosion on either connector inside and out. You can also test the controller. In the truck cab you will need to sever the blue wire several...
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  • No Light On Tekonsha Voyager Trailer Brake Controller Installed on a 2003 GMC Sierra
  • If there is no trailer connected then there should be no lights lit up on the Tekonsha Voyager brake controller # 39510. Once a trailer is connected you should see a green light. On a 2003 GMC truck or SUV you should just have to plug in the controller using harness # 3015-P. There is a junction box on the left side of the floorboard on the drivers side. Remove the cover and plug in the controller on the top row, second sport from the left. I have linked a video that shows the location...
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  • Troubleshooting N.C. Error Code on a 2004 GMC Sierra 2500 with Trailer Connected
  • The n.c. means that your brake output circuit is not complete. This is normal to see for a few seconds of turning your vehicle on without a trailer connected. If your trailer is connected there is an error on the brake output circuit. The first place I would look is in your trailer connectors. Most likely there's corrosion there and cleaning it will fix the problem. Other possible issues could be that the brake output circuit on your trailer is shorting out somewhere. Basically the problem...
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  • Brake Controller Does Not Activate Trailer Brakes with Brake Pedal on a 2005 GMC Sierra
  • On the 2005 GMC Sierra there may be some connections that need to be made under the hood to make everything fully functional and allow the brake controller to work. This is a common issue with Chevy and GMC truck owners from 1999 to 2013. I have included a link to a help article that will show you the connections that need to be made under the hood. It also shows the controller fuse location. I have also included a picture that shows the functions of the harness (end that plugs into...
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  • Brake Controller And Wiring Adapter For 2006 GMC Sierra With Tow Package And 7-Way
  • For your 2006 GMC Sierra with the factory tow package and 7-way connector installed I recommend the Tekonsha Prodigy P2 Trailer Brake Controller, part # 90885, and Tekonsha Plug-In Wiring Adapter, part # 3015-P. Simply plug one end of the adapter into your brake controller and then plug the other end into the junction box beneath your vehicle's dashboard. The P2 can be used on trailers with electric or electric over hydraulic brakes. I have included an installation video for this system...
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  • Factory Tow Package on 2006 GMC Sierra Not Getting Power To Brake Controller
  • It is possible that the power wire that feeds the brake controller has not been connected at the power distribution box under the hood. If you look at the brake controller installation help article I've linked to, you can see how the wiring connections are finalized. This usually applies to vehicles that are NOT equipped with the factory 7-way trailer connector at the rear bumper. We have seen vehicles equipped with the 7-way that don't have the connections made, so it's worth checking....
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  • Brake Controller Recommendation for 2004 GMC Sierra 1500 Towing 20-Foot Tandem Axle Trailer
  • Our customers consistently rate the Tekonsha Prodigy P2 brake controller, part # 90885, as being among the easiest to use and most reliable trailer brake controllers offered. This unit has the flexibility to be used with either electric trailer brakes or electric-over-hydraulic brakes and it can handle up to 4 axles. You will be able to use a quick-connect adapter # 3015-P to plug-in the P2 to the under-dash connection port. If your 2004 GMC Sierra 1500 has a factory 7-way connector...
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  • Hard-wire Installation of Hopkins Brake Controller in 2013 GMC Sierra
  • To hard-wire a Hopkins brake controller such as their # HM47295 in your 2013 GMC Sierra you will make connections between the 4 wires on the controller unit and vehicle wiring that is under the steering column. I have linked a photo showing the location and appearance of this bundle of blunt-cut wires. These are the wires for the tow package for the brake controller. Carefully cut the white tape binding the wires and pull them down from underneath the steering column. You will make...
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  • Prodigy P2 Brake Controller Recommendation and Installation Information for a 2008 GMC Sierra
  • The P2 Brake Controller part # 90885 that you referenced would work very well on your 2008 GMC Sierra. There are 4 blunt cut wires under the dash of your vehicle that you will use to install this brake controller. Check out the FAQ article I attached on installing brake controllers in trucks like yours, and the install video that will show you exactly how it is done.
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  • Recommended Wiring Adapter for an Older Tekonsha Voyager Brake Controller on a 2003 GMC Sierra 1500
  • You can buy an adapter for your Tekonsha Voyager brake controller for your 2003 GMC Sierra 1500. I recommend using the Tow Ready Wiring Adapter, part # 20264. There will be some splicing involved because the older Tekonsha Voyager brake controllers came with blunt cut wires rather than a plug-in style connector. You can simply splice the wires from your Tekonsha Voyager brake controller to the wires from this wiring harness color for color. The Tow Ready harness includes butt connectors...
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  • Parts Needed to Install Tekonsha Prodigy P2 # 90885 in 2006 GMC Sierra
  • Your 2006 Sierra will have a connector located under the dash that makes installing a brake controller very easy. You will need the brake controller (the Tekonsha Prodigy P2 you mentioned is an excellent choice), the wiring adapter # 3015-P, and the 4-pole/7-way connector part # HM40975 (if your truck does not already have a 7-way). Installation will be very simple. In most cases, you simply mount the controller under the dash and plug it in to the connector located in the convenience...
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  • Troubleshooting No Truck Brake Lights When Manual Override Used on Dexter Predator Brake Controller
  • According to the Dexter Predator # 58-8 Brake Controller installation instructions, if your truck lights are not illuminating properly with the manual override is activated, then you will need to check the red stoplight wiring connection. The brake controller red wire should be connected to the non-powered stop lamp switch wire on your 2008 GMC Sierra. On your specific truck there should be a wiring bundle that is below the steering column, and is to the left of the brake pedal. This...
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  • Fuse and Circuit Breaker Installation Help For Dexter Predator Brake Controller in 2008 GMC Sierra
  • When installing the Dexter Predator Brake Controller # 58-8 in your 2008 GMC Sierra you will want to follow the Dexter instructions and install the specified fuse and self-resetting circuit breaker as indicated. The vehicle manufacturer installs fuses to protect the OEM electrical components in the vehicle so any aftermarket accessory that is added will need to be protected independently of the factory fuses and circuit breakers. To correctly install the Dexter Predator you will...
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  • P.L. Error Code and Cargo Lamp Lights Up Using Primus Brake Controller on 2002 GMC Sierra
  • The PL indicates that there is a power interruption when the brake controller is supposed to be activating the trailer brakes. The fact that the cargo lamp comes on indicates to me that the red wire on the brake controller is connected to the wrong circuit. The harness you should be using is # 3025-P. Note the location of the red wire and compare it to your harness and red wire. If the red wire on your harness is in a different spot you will need to move it to the location shown in the...
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  • Brake Controller that Will Work with Electric and Electric Over Hydraulic Trailer Brakes
  • If the trailer with hydraulic brakes uses a surge coupler (the coupler pushes in when the vehicle slows to send fluid back to the trailer brakes) then you can use any brake controller you want. But if the trailer with hydraulic brakes has an electric over hydraulic brake actuator then you will need a compatible brake controller. There are a couple of controllers I normally recommend for both regular electric brakes and electric over hydraulic brake systems. They are the P2, # 90885,...
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  • What Does the E1 Error Message Mean on a Hopkins Trailer Brake Controller
  • The E1 error code on the Hopkins brake controller indicates that a trailer is not connected. If the trailer IS connected and you get the E1 code, a probable cause is a dirty trailer connector. Check the trailer connector on the trailer and on the vehicle. Clean out any dirt or corrosion. Corrosion can build up behind the connectors where the wires attach as well. It is also possible that you have blown the stop light fuse. Check the owners manual for the location of the stop light fuse...
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  • Wiring Curt Brake Controller # C51120 in 2002 GMC Sierra 1500
  • Based on your description of the problem with your Curt Discovery # C51120 Time Delayed Brake Controller one cause could be a mis-wired plug-and-play harness. Please refer to the photo provided which shows how the vehicle side of the harness should be wired. For reference I have also linked a help article concerning brake controller installations in GMC trucks. The connector should be pinned out with the four wires as shown in the provided photo. If the red wire is connected to a different...
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  • Can an Electric Brake Controller Output Go Higher than its Maximum Setting
  • When a controller is set to its maximum output it will send back 12 volts of power to the trailer brakes. If this is not adequate then it could be an indication that the full power is not reaching the trailer brakes or that the brakes need to be adjusted. It could also mean that there is something wrong with the brake magnets. But there is no way to go beyond the maximum output. To test the output you will need a multi-meter like # BTMT15 if you do not already have one. At the maximum...
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  • Troubleshooting a Pilot 2-6 Brake Electronic Brake Controller for not Detecting Trailer
  • You may try attaching your vehicle to your hitch and see if that helps the problem. Some trailers do ground through the hitch ball to the tow vehicle. According to the install instructions for the Pilot Brake Controller # 80550 the following things are probable causes to what you described. Poor connection on BRAKE line (BLUE wire). Power set too low. BLACK & WHITE wires reversed, controller destroyed. Open on GROUND line (WHITE wire) I attached a set of instructions for...
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  • How to Install a Hopkins Brake Force Brake Controller on a 2011 GMC Sierra 1500
  • To install the Hopkins Brake Force brake controller you will want to wire it to the 4 wires underneath your dash. Check out the FAQ article I attached on this. You will need to connect the two wires under the hood. You will not need to install any other circuit breakers to complete the install.
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  • How to Wire a Dexter Axle Predator Brake Controller 58-8 on a 2001 GMC Sierra
  • The light blue wire mentioned in the video of the # HM40975-11998 7 and 4-pole trailer connector being installed on a 2002 Silverado is for a camper shell brake light, and is not for use with an electric brake controller. The electric brake wire on your 2001 GMC Sierra is run from the port below the dash into the engine compartment, but it does not continue back to the rear wiring bundle. You will need to finish the connection by running a wire from the 7-Way in the rear of the truck...
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  • No Power to Brake Controller # 90185 When the Brake Pedal is Applied on 2005 GMC Sierra
  • First I suggest you open your fuse box and check the fuse for the center high-mount stop light (CHMSL). If this fuse is blown it could account for the problem. If the fuse is not blown you can next check the wiring of the connector on the vehicle side of the brake controller harness. For your model year the red wire should be connected to pin D on the wiring adapter for the brake controller. Please refer to the attached photo. The red wire carries the signal from the stop lamp switch...
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  • Diagnosing Malfunctioning Tekonsha Voyager Brake Controller on 2003 GMC Sierra
  • It is pretty unlikely that the factory connection point under the dash where the controller plugs in has been pinned incorrectly. I would begin by checking under the hood to ensure that the final brake controller connections were made at the power distribution box on the inside of the drivers side fender. Depending on how the vehicle was equipped, in may cases this connection was not made on the assembly line. As you can see in the provided photo, look for a red wire with a ring terminal...
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  • Installation of the Prodigy RF Brake Controller on a 2009 GMC Sierra
  • The two wires that you are reading about are the battery charge wire that goes back to the 7-way connector and the brake control power wire. Typically, these wires will need to be connected to use a brake controller in your 2009 GMC Sierra. If you plan on installing the Tekonsha Prodigy RF Brake Controller, # 90250, then you will only need to install the battery charge wire, which will supply 12V power to your 7-way connector. This wire can be found to the left of the under hood fuse...
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  • Completing Under Hood Wiring Connections When Installing Brake Controller on 2002 GMC Sierra 1500
  • To install the controller itself, you will first need the # 3025-P wiring harness. Under the hood, The red wire that provides power for the brake controller needs to be connected to the power post on the fuse box that is closest to the firewall. A 30 amp fuse will need to be placed in the closest fuse location to the post to activate it. The blue wire which carries the brake controller output voltage will need to be extended with a length of 10 gauge wire and extended under the vehicle...
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  • Integrated brake controller
  • If the vehicle has the factory installed integrated trailer brake controller (ITBC), the tow package wiring that exists under the dash is used to install an aftermarket controller. The red/black tow package wire connects to the black controller wire The white tow package wire connects to the white brake controller wire The light blue tow package wire connects to the red brake controller wire. The orange tow package wire is NOT needed, cap off the end and bundle the wire up out of...
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  • Brake Controller Does Not Activate Trailer Brakes with Brake Pedal on 2003 GMC Sierra 3500
  • There are indeed 2 different brake controller wiring harnesses used between the 2002 and 2003 GMC Sierra. A 2002 would use # 3025-P. The 2003, like you have, uses a # 3015-P. The difference between these 2 harnesses is the way they are pinned out. On # 3025-P the red wire is located next to the white ground wire, and below the black power wire. On # 3015-P the red wire is located next to the blue wire. You will not necessarily need a completely different harness if yours is pinned...
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  • Parts Needed to Install a Hopkins Brake Force Trailer Brake Controller on a 2011 GMC Sierra 1500
  • On the 2011 GMC Sierra, there is a tow package wiring bundle under the dash so you will not use a plug int type of wiring harness. What you can use is # HM47685. One end plugs into the brake controller and the other end has blunt cut wires that you will need to splice into the tow package wiring. The tow package wiring is four or five blunt-cut wires under the left side of the instrument panel. These wires are located above your left shin as you are seated in the drivers seat. The wires...
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  • Brake Controller Wiring Locations for 1999 GMC Sierra Installing a Primus Trailer Brake Controller
  • It sounds like your 1999 GMC Sierra does not have the factory tow package. If this is the case and there is not a round plug with a cap above the spare tire you will need the 7-pole, RV-style trailer connector, wiring harness, # PK11898, to connect to the wire bundle found above the spare tire. If your truck has the round plug and cap above the spare tire, you will need the 4-pole and 7-pole connector, part # 30955, which will plug into the round OEM connector once the protective cap...
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  • How Should the Tekonsha Voyager Brake Controller Be Installed in a 2010 GMC Sierra
  • The best place to put a brake controller is in a location that is easily accessible for the driver in case he/she would need to quickly access the override lever of the brake controller. Typically, to the right of the drivers right leg on the lower portion of the dash is where most people mount it. The Tekonsha Voyager Brake Controller # 39510 needs to be installed between -20 and 70 degrees vertically and needs to be installed inline with the direction of travel. Check out the review...
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  • Brake Controller Wiring Location in the Cab of a 2010 GMC Sierra 1500
  • I was unable to find a guide for your specific vehicle, however I have included a link to a video for a 2008 GMC Sierra that shows the brake control wires under the dash below the steering column and down by the brake pedal. The wires will be bundled up and there may be a white tab around them. Let me know if this is not helpful and we will do further research to try to help you find these wires. The video shows the technician pulling the wires from the brake pedal area at the 1 minute...
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  • How Would a P-3 Brake Controller Install on a 2009 GMC Sierra
  • In 2007 General Motors quit offering the plug in type connectors on these vehicles with a factory tow package. These models have four (possibly five) blunt cut wires under the left side of the instrument panel to the left of the steering column. The wires can be identified by a white label and the color of the wires. The wire colors are (1) Red/Black wire, (1) White wire, (1) Light Blue/White wire and (1) Dark Blue wire and possibly (1) Orange wire. There are also a couple connections...
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  • Hopkins Brake Controller Does Not Activate Trailer Brakes with Brake Pedal on a 2008 GMC Sierra
  • It sounds like you have the red wire on the brake controller connected in the wrong spot or to the wrong wire on the vehicle. The wires on the truck will not match up color for color to the brake controller wires. The tow package red wire connects to the black brake controller wire. Dark blue on truck goes to blue on the brake controller. Light blue on truck goes to red on the brake controller. And white will connect to white. It is that light blue wire that carries the brake light signal...
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  • Under Hood Connections for a Trailer Brake Controller on a 2002 GMC Sierra 1500
  • You are very close and I am certain you can get it all wired correctly at home. On your truck there are some connections that need to be made under the hood to make everything fully functional. We actually have an FAQ article that covers brake controller installations on your truck, the different wiring situations you may encounter, and the connections that need to be made under the hood. I have included a link to it for you. The blue wire under the hood does need to connect to the 7-Way...
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  • Hayes Energizer III Brake Controller 81741B Installation on a 2012 GMC Sierra 1500
  • It sounds like you are on the right track. Your 2012 GMC Sierra does not have an OEM plug for installing a brake controller, but they did run the wires for you. We do not offer an adapter that would allow you to hard wire the Hayes Energizer III brake controller, but you do have the option of just cutting off the existing plug. You should be finding the correct group of wires under the left side of the instrument panel you see to the left of the steering column. There may very well...
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  • No Power to Brake Controller After Installation on 2008 GMC Sierra
  • On your 2008 GMC Sierra, you will want to check the power distribution box located under the hood of your vehicle, on the drivers side. If you remove the cover of the box there will be two power posts located at the front of the box. The left power post should have a red wire attached to it. The red wire is the power wire for the brake controller. You will also want to check the 30 amp fuse adjacent to the power post to make sure it is installed and working. This fuse is what activates...
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  • Installing a Trailer Brake Controller on a 2008 GMC Sierra 1500
  • To install a brake controller on a 2008 GMC Sierra, you will need to locate the brake controller wire bundle under the dash. You will need to look below the steering column and to the left of the brake pedal. The wire bundle will be held together with white tape. The white tape should also list the functions of the wires. We have found that the red wire on the truck connects to the black wire on the brake controller for power. The dark blue wire on the truck connects to the brake controller...
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  • Parts Needed to Install a Voyager Trailer Brake Controller on a 2011 GMC Sierra
  • On a 2011 GMC Sierra, there is no port under the dash to plug in a wiring harness but there are tow package wires. You will find the wires under the dash and below the steering column held together with a white tag. The tag will list the functions of the wires. You will need to attach these wires to the 4 wires on the brake controller but they will not match color for color. The brake controller white wire is the ground, black is 12 volt power, blue is out to the trailer brakes, and...
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  • Installation of Brake Controller on a 2011 GMC Sierra With Tow Package
  • We have not seen a 2011 GMC Sierra that will have a factory brake controller plug-in for an aftermarket brake controller. All of the 2007 and newer GM full size trucks and SUVs quit offering a plug-in type connection. None of the brake controller harness manufacturers produce a plug and play wiring harness that will fit a 2011 GMC. The plug you are referring to is probably not for the brake controller. If you need to find out what the plug is for you can use a circuit tester like the...
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  • Brake Controller Installation and Troubleshooting on a 2003 GMC Sierra 2500
  • If you have a factory 7-Way trailer connector on your 2003 GMC Sierra 2500 you should be able to use a brake controller adapter, like # 3015-P for Tekonsha brake controllers, to plug your brake controller into the factory brake controller port on your vehicle. The factory port is located in a electrical junction box that is located on the drivers side, below the dash, to the left of the brake pedal. You might want to also check to make sure the blue wire (power wire for 7-Way) and the...
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  • Brake Controller Doesn't Power Up Once Installed on a 2000 GMC Sierra 1500 4x4
  • It sounds like you still need to make a couple connections under the hood of the truck. 2000 GMC Sierra models that did not come with a factory 7-Way do not have all the brake controller functions for you, but it is fairly easy to get everything hooked up and functioning. On the driver side under the hood, first remove the bracket in the top, driver side corner closest to the cab. This will allow you to remove the top and lower covers from your accessory fuse block. Once you have...
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  • Only the Left Side Trailer Brake Locks Up using a Time Delay Brake Controller
  • First, since only the left side was locking up, there could be a problem with the brake and/or wiring on that side. You will want to check that the wiring is intact with no cuts, breaks, or nicks. Also make sure that the ground is attached to a clean and corrosion free bare metal surface. If the brake or wiring is not in working order, a new brake controller would not help. However, I do recommend a proportional controller over a time delay controller because they are the safer way...
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  • Installing a Tekonsha Voyager Trailer Brake Controller, # 39510 on a 1999 GMC Sierra 2500
  • You are correct. The red wire on the brake controller goes to the wire on your 1999 GMC Sierra that shows a signal on a circuit tester, like # 3808, ONLY when the brake pedal is pressed. If it shows a signal at any other time, like when the headlights are turn signals are on, it is not the correct wire. However on your truck, there is a brake controller port located under the dash, to the left of the brake pedal in an electrical junction box. To connection the Voyager, # 39510, to it,...
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  • Activator II Not Working Correctly on a 2008 GMC Sierra Pickup
  • According to the manufacturer, when there is no decimal point on the Activator II, # 5500, when the brake pedal is pressed, there are two possibilities. First, use a circuit tester, item # 3808, and verify that the red wire going into the controller has power only when the brake pedal is pressed. Next, the fuse in the stoplight circuit should be checked. The only other possibility is that there is a bad circuit inside the brake controller and it will need to be replaced. Brake...
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  • Installing an Aftermarket Trailer Brake Controller on a 2011 GMC Sierra with a Factory Brake Control
  • Adding an aftermarket brake controller, like the Tekonsha P3, # 90195, to a 2011 GMC Sierra is fairly simple, even if the truck has a factory integrated brake controller. The Tekonsha P3, # 90195 is compatible with both electric and electric over hydraulic brake systems. First, you will need to locate a bundle of wires under the dash to connect the brake controller. This bundle is on the left side of the instrument panel, above the brake pedal. The wires are held together by a white...
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  • Installing the Tekonsha Prodigy Trailer Brake Controller # 90185 on a 2008 GMC Sierra 2500HD
  • The 2008 GMC Sierra will not have a port for a brake controller wiring harness, but it will have blunt cut wires located under the dash, below the steering column and to the left of the brake pedal. The wires are held together by a white tag or tape that may also list the functions of each wire. It is possible that the wires/functions of the tow package wiring under the dash is as follows: Brake Controller White to Truck White (ground) Brake Controller Black to Truck Red (12 volt power) Brake...
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  • Installation of a Reverse lockout Circuit or Brake Controller on a 2000 GMC Sierra
  • I believe we can help. We will need to determine whether you have a trailer with surge brakes or with electric brakes. Surge brakes on trailers are not electrically activated, they are activated by the pressure created between the vehicle and trailer when the vehicle slows. Many times surge brake couplers have an electric lockout, so the trailer can be backed without applying the brakes. This electrical connection is spliced into the vehicles backup light circuit so the lockout is activated...
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  • Installing the Prodigy P3 Brake Controller on a 2011 GMC 3500 DRW Denali with Factory Brake Control
  • We have tech bulletin online, see link, that explains in detail how to install a aftermarket brake control, like the Prodigy P3, item # 90195, on the Chevrolet and GMC pickups with factory integrated brake control. You will not remove the factory controller from the dash so there is no way to install the P3 in the dash and at this time there is not a fascia cover available for the installing the P3 in this location. If the factory brake controller was removed you would get a trailer...
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  • Installing Tekonsha P-3 Trailer Brake Controller # 90195 On 1994 GMC Sierra
  • The wire from the Tekonsha P-3 Trailer Brake Controller, part # 90195, that connects to the brake light switch is Red. To determine which wire you will need to splice into on your 1994 GMC Sierra, you will need to use a circuit tester, part # 3808. You will need to connect the Red wire from the brake controller to the wire that only has signal when the brakes are applied. If you have trouble finding the stoplight switch wire, you can splice into the Center High-Mount Stoplight wire. In...
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  • Prodigy Brake Controller # 90185 Stopped Working On A 2008 GMC Sierra
  • On the Tekonsha Prodigy Brake Controller, part # 90185, you will want to activate the manual lever and see if you have a reading on the brake controller. If you do not have the trailer connected it should show a n.c. reading for not connected. If it just shows a blank display even when the manual lever is activated then you have a loss of power or loss of ground to the brake controller. You will need to check the connections of the brake controller wires to the wires underneath the dash...
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  • Where Are The Fuses Installed When Installing Brake Controller On A 2011 GMC Sierra 1500 SLE
  • On your 2011 GMC Sierra 1500 SLE, when installing the Tekonsha Prodigy P2 Brake Controller, part # 90885, you will need to activate the brake controller power post under the hood with a 30-amp fuse in the correct slot in the power distribution box. Also, to activate the 12-volt power lead post under the hood you will need a 40-amp fuse in the correct slot in the power distribution box. Most vehicles are already equipped with the fuses for the brake controller power post and 12-volt...
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  • Troubleshooting 7-Way Trailer Connector Does Not Have 12 Volt Power on a 2010 GMC Sierra
  • The first thing you will want to check is the pin on the front of the 7-Way that is in the 11 oclock position using a circuit tester like the Quickee # 3808. If it is not showing a signal, then it could be that the 12 volt hot lead is not connected at the point under the hood. The wire you will need is red/black and has an eyelet connected to one end. It is coiled up under the master cylinder/brake booster assembly and must be connected to the under-hood fuse box. The battery charge...
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  • Can I Install the Prodigy P2 Brake Controller in A 2005 Saturn Vue and a 2008 GMC Sierra
  • Moving your Prodigy P2 brake controller, item # 90885, to your 2008 GMC Sierra truck will require that you have a Replacement Brake Control Plug-In Harness, item # 20127, installed on the GMC Sierra. We have a video detailing the installation of this harness for you to review. The P2 and the Voyager are wired the same. The white wire is ground, the black wire is power into the brake controller, the red wire is the stoplight switch circuit and the blue wire is the output for the electric...
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  • Installing an Electric Trailer Brake Controller from Scratch on a 1997 GMC Sierra 1500
  • To install the Tekonsha Voyager Brake Controller, # 39510, or any brake controller in your 1997 GMC C/K series 1500, there are a couple of items you will need in addition to the brake controller. First, if the truck does not already have a 4-Way trailer connector, you will need to add one, # 118315. Installation is easy. This harness plugs in line with the vehicle tail lights. After making that connection, you will just need to attach the white ground wire to a clean, bare metal surface....
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  • Recommended Electric Brake Controller for a 2000 GMC Sierra 2500 Towing a Tandem Axle Travel Trailer
  • The # 90885 Tekonsha P2 brake controller would actually be a great choice for your 2000 GMC Sierra. This unit is proportional, and works for up to 8 trailer brakes. You may have received a factory pigtail with your truck, usually stashed in the glove compartment. If so, you would only need the brake controller itself, as you would use this factory wiring, connected to the pigtail included with the P2, to plug the brake controller into your vehicle. The factory wiring might not match...
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  • Wiring Instructions for Tekonsha P-3 Trailer Brake Controller on 2011 GMC Sierra 2500HD
  • Yes, I can give you step-by-step instructions to install the Tekonsha P-3 Trailer Brake Controller, part # 90195, in your 2011 GMC Sierra 2500HD. To begin, if you do not have a factory 7-way connector at the the rear of your vehicle, you will need to install Twist-in, 7-Pole, RV-Style Trailer Connector, part # PK11916. Then you will need to mount the brake controller, you will want to mount the brake controller level and where the driver can easily reach it. A typical place to mount...
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  • Installing The Tekonsha Prodigy P2 Brake Controller # 90885 On A 2010 GMC Sierra 1500
  • The Tekonsha Prodigy P2 Brake Controller # 90885 will come with a universal plug-in pigtail wiring harness that will be hardwired to your brake controller wiring harness under the dash on your 2010 GMC Sierra 1500. The white wire on the brake controller is the ground wire and that wire should be wired to the white wire on your wiring harness under the dash. The remaining 3 wires from under the dash are red/black, dark blue, and light blue/white. They should be wired as, red/black wire,...
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  • Troubleshooting Draw-Tite Brake Controller Part # 5500 on 2002 GMC Sierra
  • Troubleshooting the problem will require a process of elimination. As a first step, use a circuit tester, part # 3808 or # 40376 on the blue wire just after it exits the rear of the controller as the manual over-ride switch is activated. You should see voltage on this wire. Next, have a friend activate the manual over-ride while testing the brake output pin on the 7-way trailer connector located at the rear of the vehicle. If the connector is compared to the face of a clock, the output...
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  • Brake Controller Recommendation and Installation on a 2003 GMC Sierra with or without Factory 7-Way
  • I did a little research and found that the Dexter Predator, # 58-8, is for 2 to 4 brakes. So if each wheel on your two axle trailer has a brake assembly, or just two of them, this brake controller will work. Brake controllers are not vehicle or trailer specific, so you will be able to use the best one for your application. I recommend going with a proportional controller because they offer the best and safest braking, and will reduce wear on both the trailer and tow vehicle brakes. I...
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  • Wiring a Prodigy P2 Brake Controller on a 2009 GMC Sierra
  • You are correct the GM wire colors do not match the standard brake controller wiring colors. You will want to connect the wiring as follows from your Tekonsha Prodigy P2 Brake Controller - Proportional part # 90885 Connect the RED WITH BLACK STRIPE wire from the GM harness to the BLACK wire on the brake controller. Connect the WHITE wire from the GM bundle to the white wire of the WHITE wire of the brake controller. Connect the LIGHT BLUE/ WHITE wire of the GM bundle to the RED...
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  • Prodigy RF Brake Controller Flashes NC and is Unable to Pair Hand Held Unit on a 2010 GMC Sierra
  • I spoke with my contact at Tekonsha about the problem you are having with the Prodigy RF Brake Controller, # 90250. He has run into this issue before and there is a possible solution. Since 2007 GM still provided the necessary wiring for brake controllers on tow packages but they did not always make the connections complete in many cases. The end result is that under the hood, you will have to make some connections to make the tow package functional. There are two connections that need...
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  • Brakes Lock Up On Horse Trailer When Connected To 2005 Ford F250 With Valley Brake Controller
  • It sounds like you are going to need to check the wiring on your whole towing setup. You will need to use a circuit tester like the Quickee Circuit Tester, # 3808, and want to start by checking the brake controller wires to make sure they are connected properly. You should have power in to the controller on the black wire and power leaving the controller on the blue wire when the brake pedal is pressed or the manual slide knob is activated. The red wire should have power on it only...
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  • The Prodigy Brake Controller Will Not Lock Up Brakes At The Highest Setting
  • The brake controller should have nothing to do with your trailer running lights blowing fuses as long as the trailer connector is wired properly. You will want to check for a short in your trailer running light wiring that will be causing the fuses to blow. You will want to check the trailer wiring for the running lights for any bare or frayed wires and tape them up or repair them. If the Prodigy brake controller is not locking up your brakes at the highest setting then you will...
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  • Will I Install a Draw-Tite Activator the Same Way on a 2006 GMC Sierra as a 2005 Chevy Avalanche
  • Physically installing and mounting the brake controller will be the same. As always, before you drill your mounting holes, check for clearance so that you do not pierce any wires. If you use a plug-in harness for your brake controller, the two trucks should have the same brake controller port.
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  • Troubleshooting P-2 Brake Controller Installation on a 2008 Chevy 1500
  • Since there is no power at the bundled wires under the dash the problem is most likely under the hood at the power distribution box. The power for the brake controller is supplied from a wire that is located between the driver-side front fender and the power distribution box (see photo link). There is a ring terminal on the end of the wire and it should be ran to the left power stud located at the front of the power distribution box with a M6 nut, item # 185916. If the wire is connected...
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  • Troubleshooting Brakes Seizing on Trailer Towed with a 2002 Chevy Silverado
  • It sounds like you have the power setting and/or the boost settings too high on the Tekonsha Prodigy brake controller, # 90185. To reset the power, connect the trailer and start up your 2002 Chevy Silverado. While the motor is running, hold the manual override full left and set the power knob to 6. Make sure the boost feature is off (it will indicate .c if the boost is off). Next, tow the trailer at 25mph and fully apply the manual override. If the brakes lock up, turn the power down...
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  • Transferring Prodigy Brake Controller to 2009 Ford F-150 Will it Work with Anti-Lock Braking System
  • You can easily install the Prodigy, item # 90185, brake controller on your 2009 Ford F-150 with the factory harness that was provided with your truck. Just be sure that when you splice the wires from the Prodigy to the wires on the Ford adapter you connect the correct wires together. The wires exiting the back of the Prodigy are as follows. White - Ground Black - 12 Volt Power into the Prodigy Red - Stoplight Circuit Blue - Trailer Brake Feed Circuit If you would like a wiring...
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  • Brake Controller Installation on a 2002 GMC Sierra Pickup, Possible Wire Colors and Functions
  • You might have a port on your truck, driver side, to the left of the emergency brake pedal in a power distribution box. If so, you can just plug in wiring adapter # 20263 and match the colors on the other end to the brake controller. To complete installation and to activate the tow package (if it has not been done already) there are some connections that need to be made under the hood. I have included an FAQ explaining the process below. Wire colors are not an exact science, even on...
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  • Brake Controller Wiring Adapter for 2003 GMC Sierra
  • To install the Tekonsha Prodigy P2 Brake Controller # 90885 in your 2003 GMC Sierra 2500 series, you would use the Wiring Adapter, part # 3015-P. This adapter features a connector on each end, one side plugs in under the dash, the other end would plug into your Prodigy P2 brake controller, with no cutting or splicing required. The adapter would plug into the wiring block located behind the emergency brake pedal. The black cover on the junction box would be removed, and the adapter plugged...
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  • E1 Error Code On Hopkins Trailer Brake Controller - Reliance, # 47285, on 2003 GMC Sierra
  • If you press the manual button on the Hopkins Agility brake controller, # HM47295, and the trailer brakes work, then the problem is in the position of the red wire on the wiring harness under the dash. You might have a wrong brake controller wiring harness. The correct harness is the Universal Brake Control Wiring Adapter 2003 - 06 Chevrolet, GMC, Cadillac, # 20264. If you unplug the harness and check the wire locations on the connector, with the blue locking clip in the down position...
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  • On 2002 GMC Sierra 2500HD with Tekonsha Prodigy, # 90185, Controller Only Works Manually
  • The Tekonsha PRODIGY Brake Controller - Proportional, # 90185, on a 2002 GMC Sierra 2500HD senses when the vehicle is braking by the connection to the CHMSL (Center High Mounted Stop Light)circuit, which is the third brake light. You can check if the third brake light is working by checking the fuse, which is located in the fuse block and probably marked CHMSL. If the fuse is good then you should test with a circuit tester Draw-Tite Circuit Tester Kit, # 40376, the red wire that exits...
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  • Will Hopkins Agility Brake Controller Not Light Up Until a Trailer is Connected
  • If the Hopkins Agility Brake Controller, part # HM47294 is installed and wired properly, the screen will display one red dot in the bottom right hand corner when a trailer is connected. The screen will be blank when no trailer is connected. Check the Operating/Setting Your Controller section of the instructions for the brake controller. It has a list of information the display on the brake controller provides. In case you do not have the instructions, I have linked to them below.
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  • Why Wont OEM Brake Controller on 2008 Chevy Silverado Actuate Electric Over Hydraulic Coupler
  • The IBC on your Chevy truck will not actuate electric over hydraulic brakes. You will need to install an aftermarket brake controller like the Tekonsha P-3, part # 90195. The factory installed tow package wiring is located under the dash, above the area between the emergency brake pedal and the brake pedal. Look for a bundle of 4 or 5 wires with a white tag hanging from it. The red/black tow package wire attaches to the black wire of the aftermarket controller. The white tow package...
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  • Brake Controller for 2005 GMC 3500 with Allison Electronic Down Shifting Transmission
  • The Tekonsha P-3 Brake controller, part # 90195 should work just fine with your vehicle. You could order part # 90195-3051P. It is the P-3 Brake Controller plus a vehicle specific wiring harness that will plug into a port under your dash and make the controller plug and play. I have added a link below of the most popular brake controllers and the harnesses for your vehicle. I would stick with proportional controllers as they will provide smoother braking with a down shifting transmission.
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  • Parts Needed for Brake System to Flat Tow a 2006 Jeep Unlimited Behind a 2005 GMC Sierra 2500HD
  • We have just the system you need. The RoadMaster Even Brake Portable Braking System, part # RM-9400, can quickly be attached to the brake pedal and does all of the braking for your towed car proportionately to the motorhome.
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  • Brake Controller for a 2001 GMC Sierra
  • Yes, you will need a brake controller to operate your trailer brakes. For your 2001 GMC Sierra, our most popular brake controller is the Tekonsha Prodigy, part # 90185. You will also need the Brake Controller Wiring Adpater, part # 3025-P. One end of the Adapter plugs into the Prodigy, the other end plugs into the installation port located on the firewall behind the emergency brake pedal. For your convenience, I will provide a link to our GM Truck Brake Controller Install Guide. This Guide...
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  • Brake Controller Wiring Identification on a 2007 GMC Sierra
  • The dark blue wire would attach to the blue wire coming off of your brake controller. The white wire would match up with the white wire. I would recommend using a circuit tester, part # 40376, to verify the function of the remaining wires. The light blue (which should show current only when the brake is pressed) would go to the red controller wire, and the red wire (which should show 12v with the ignition on) would attach to the black wire on the controller. The remaining wire is not used,...
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