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Brake Controller > 2012 > GMC > Sierra

Hopkins Brake Controller for the 2012 Sierra by GMC

Hopkins Brake Controller

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Code:   HM47295



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Hopkins Agility Trailer Brake Controller - Hardwire - 1 to 4 Axles - Proportional - 2012 Sierra by GMC

Proportional brake controller can be mounted within a 360-degree vertical range. Digital display indicates braking action of trailer. Fine-tune power adjustment has 5 levels so that you can set braking intensity to suit your towing needs.


  • Brake controller activates trailer brakes in proportion to your GMC Sierra's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow GMC Sierra
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Multiple mounting options
    • Position at any angle up or down in the vertical plane
      • Recommended mounting is between -20 degrees and 70 degrees
  • 5 Sensitivity levels let you adjust initial braking power and aggressiveness
  • Digital display is easy to read
  • Built-in, slide manual override lever
  • Pigtail harness hardwires into your GMC Sierra


  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Designed for use with electric brakes only
  • Dimensions: 3" wide x 5" long x 1-1/4" tall
  • Mounting: 360-degree vertical plane operating range
  • 5-Year limited warranty

Proportional Braking

With a proportional brake controller, you can get heavy-duty emergency braking, general braking or slow-to-an-idle braking for your trailer automatically. The intensity with which your trailer brakes are activated and the rate at which they are applied are dependent on the deceleration of your tow GMC Sierra. This means that, unlike time-delay controllers - which send the same amount of preset power to your trailer brakes every time - proportional controllers are able to adapt to every braking situation differently. So, if you slam on the brakes in your truck, your trailer brakes will activate with that same extreme intensity. And if you merely slow down as you approach a red light, your trailer will gradually brake in the same manner.

As long as the Agility controller sits level on a horizontal plane and is pointed in the direction of travel, it will sense - via an internal inertia sensor - how your tow GMC Sierra brakes. This inertia-based sensor responds to the deceleration of your tow GMC Sierra as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.

Power and Sensitivity Adjustment

Getting the braking power you need for your application is simple with the Agility. First, set the overall power so that you can achieve maximum braking without locking up your trailer brakes.

Once you have the overall power set, you can fine-tune the power output by adjusting the sensitivity of the internal sensor. Use the adjustment buttons on the top of the controller to achieve your desired degree of intensity. There are 5 levels to choose from. The first level offers the least amount of sensitivity, making it ideal for lightweight setups. The heavier your load, the higher you will want to take the sensitivity. At level 5, the sensitivity of the internal sensor is as high as it can go. This level provides the most aggressive braking and is ideal for heavy loads.

Digital Display

On the front of the Agility there is a digital display that is designed to keep you aware of the braking action of your trailer. This screen shows your sensitivity level, overall power percentage and error codes for issues such as a short circuit.

Simple Installation

The Hopkins Agility can be mounted anywhere within 360 degrees vertically, but it is recommended that it be mounted in your cab at an angle that is between -20 degrees and 70 degrees to make it easier to access.

Correct Agility mounting90-Degree Agility mounting

Note: The Agility must be mounted on a level horizontal (side-to-side) plane and must be lined up with the direction of travel for the internal sensor to function properly.

This brake controller is designed to be hardwired into your GMC Sierra.

Installation Accessories

See's exclusive 7- and 4-way brake-control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your GMC Sierra.

Note: One of the following will be required to ensure proper installation:

20-Amp circuit breaker (9506P - sold separately) for 2- to 4-brake applications

30-Amp circuit breaker (38630 - sold separately) for 6- to 8-brake applications

47295 Hopkins Agility Proportional Trailer Brake Control - Hardwire

Customer Reviews

Hopkins Agility Trailer Brake Controller - Hardwire - 1 to 4 Axles - Proportional - HM47295

Average Customer Rating:  ratingratingratingratingrating5.0 out of 5 stars   (4 Customer Reviews)

- HM47295

ratingratingratingratingrating by: A. Smith09/21/2012

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Excellent product, easy installation, works great. Here is a pic of the mounting spot I chose in a 2012 Ram 1500. etrailer has the BEST customer service on the web! 55427

- HM47295

ratingratingratingratingrating by: Mike04/02/2013

Is this review helpful?

The wiring kit I ordered and installed using the online insructions from E Trailer made installation easy. The controller works great and was easy to calibrate. I am very happy. Thanks E Trailer, you guys are first rate!!73817

- HM47295

ratingratingratingratingrating by: Gary K.12/16/2012

Is this review helpful?

The Hopkins Agility controller has very easy to understand instructions,along with it's hardware makes the job easy! Folks at Etrailer are a wealth of information with what else you may need to make the project effortless! They also helped out when I became close on time , by expediting the shipping!!!!!61579

- HM47295

ratingratingratingratingrating by: Jeff N.03/06/2014

Is this review helpful?

Very easy installation and the product works great. Installed it on a 1998 3500 series Chevy truck and works great with our car trailer!119680

Ask the Experts about this Hopkins Brake Controller
Expert Answers about Hopkins Agility Trailer Brake Controller - Hardwire - 1 to 4 Axles - Proportional - HM47295                                           Do you have a question about this Brake Controller?

  • What Does SC Message Mean On Hopkins Agility Brake Controller, # HM47295
  • On the Hopkins Agility Brake Controller, # HM47295, the message is actually SC, which means short circuit. First, you will want to check the blue wire for a short by severing the connection of the blue wire at the brake controller. You will want to leave enough wire to reattach the blue wire after testing. If you step on the brakes after severing the blue wire and you still get the SC reading, then the red stoplight switch wire is the problem. The red wire needs to attach to the stop light
    view full answer...

  • Function of Prodigy Brake Controller on a 2006 Chevy Silverado
  • The Prodigy is a proportional brake controller and applies power to the trailer brakes in proportion to the speed in which the vehicle is stopping so you will not get full power to the trailer brakes when the trailer is not moving. The motion sensing device will apply more power when the towing vehicle is stopping faster than it will when it is stopping slower. The amount of voltage sent to the trailer brakes is not dictated by pressing the brake pedal but by the stopping motion of the towing ve
    view full answer...

  • Troubleshooting Brake Controller Not Working When Brakes Are Applied but Works With Override Switch
  • This sounds like the trailer brakes are not receiving the signal from the brake controller when you apply the brakes. I believe what is happening is that you may have a loose, broken, or inaccurate connection on the red wire from the brake controller. The red wire needs to attach to the stop light switch above the brake pedal. It connects to the wire on this switch that carries a signal ONLY when the brake pedal is pressed. It should not have a signal at any other time. Use a circuit tester,
    view full answer...

  • 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 the
    view full answer...

  • Installing Hopkins Brake Controller # HM47295 Using Installation Kit # ETBC7 On 2006 Nissan Murano
  • If you are going to be installing the Hopkins Brake Controller, # HM47295, and the 7-Way plug at the same time on your 2006 Nissan Murano, I would recommend getting the brake controller installation kit # ETBC7, which includes the # 37185 adapter that would plug into a 4-Way on the vehicle, as well as everything else you will need to complete the brake controller installation. If you do not have a 4-Way on your vehicle, then you would need the CURT T-Connector Vehicle Wiring Harness with 4-Po
    view full answer...

  • How To Wire Hopkins Agility Brake Controller 47295 to a 2000 Chevrolet Silverado Z71
  • If you have the brake controller port and the OEM supplied brake control harness that plugs into the port and has 5 loose wires, you will only need 4 of these wires. The brown wire is an illumination circuit. Some older brake controllers used a separate circuit to light the controller display, but it is not needed any longer. The colors you listed are standard GM/Chevy and match as follows: Truck Controller Red Black Light Blue Red Black White Dark Blue
    view full answer...

  • Trailer Brakes Lock Up When Brakes Are Applied WithThe Hopkins Agility Brake Controller, # HM47295
  • It sounds like you might want to check the adjustment of your trailer brakes. It sounds like the brake shoes are adjusted too far out. When you are applying the brakes with the sensitivity setting at its lowest setting, it is still sending a little current to the brakes and if the brake shoes are too far out they might be locking up. The best way to adjust the brakes on your trailer is to back off the brake shoes until there is no drag on the drums at all and then tighten them up until you g
    view full answer...

  • Recommended 2007 Toyota Tundra Wiring for a Hopkins Agility Brake Controller # HM47295
  • The Hopkins brake controller # HM47295 has four wires coming out of the back of the unit, and does not have a plug. Instead of an adapter like part # HM47815 which has plugs on both ends, I would recommend a pigtail like part # 20265, which would match color to color with the wires on the brake controller, and would still allow you to plug in to the factory brake controller port on your 2007 Toyota Tundra. Alternatively, you could use the plug-in version of the Hopkins brake controller,
    view full answer...

  • Hopkins Brake Controller # HM47295 Only Has Full Voltage When Using Manual Override Switch
  • It sounds like there is a bad connection on the red wire from your Hopkins Brake Controller # HM47295 to the stop light switch. You will need to check to make sure the red wire has a good connection to the stoplight switch wire. You can use a circuit tester, part # 3808, to verify that the red wire is connected to the wire that only has signal when the brakes are applied. The manual override on the brake controller allows you to manually power the brakes on the trailer and does not requir
    view full answer...

  • Installing Brake Controller Using Factory Harness on 2006 Toyota Tundra
  • You would not want to run the fifth wire from your towing package to the Hopkins Agility Brake Controller, part # HM47295. The fifth green wire that you have found is an illumination circuit, and is not needed. You can confirm this if you like by using a circuit tester like part # 3808 on the green wire. This wire should only show voltage when the vehicle headlights are switched on. I attached installation instructions for the # HM47295 below for you to check out.
    view full answer...

  • Hopkins Agility Electric Brake Controller Only Works with Manual Override, 2005 Chevy Silverado
  • This sounds like a problem with the red wire on the brake controller. If you are using a wiring harness like # 20264, you will want to make sure that the wiring is intact by checking it with a circuit tester like # 3808. The red wire should have a signal only when the brake pedal is pushed. If it does not, then check the pins on the truck where the brake controller connector plugs in. If the signal is coming through there, check to make sure the pin for the red wire is in the correct spot in
    view full answer...

  • Troubleshooting Agility Brake Controller Indicating No Trailer Connected with Trailer Connected
  • First, we should make sure you have the correct wiring harness. You should be using # HM47795. This harness has the red pin for the stop light circuit unhooked from the plug. You will need to make sure it is placed in the correct spot. Check the port on the truck to determine where it needs to go. Using a circuit tester like # 3808, if needed, test the pins in the port until you find the one that is hot when you step on the brakes. Once you find it, place the pin in the corresponding spot in the
    view full answer...

  • Should Vehicle Brake Lights Come On when Using Manual Override on Agility Trailer Brake Controller
  • When using the manual override on a brake controller, including the Hopkins Agility Electric Brake Controller, # HM47295, the vehicle brake lights should not come on. Most modern brake controllers do not activate the vehicle brake lights, though there are some older models that did which must have been what you had. The way the manual override works is that it bypasses the signal from the brake switch and sends power directly from the controller to the trailer brakes. Brake lights coming on w
    view full answer...

  • Troubleshooting Brake Lock Up When Using a Hopkins Agility Brake Controller # HM47295
  • The first thing I would do is adjust the braking power down to the point that the brakes stop locking up when you hit the brakes. You will do that by pressing the button with the minus sign on it until the brakes stop locking up. I attached installation instructions for this product for you to check out. If you have already done that then you might have an issue with the brake shoes on your trailer. For that you will want to check the adjustment of your trailer brakes. It sounds like the b
    view full answer...

  • Hopkins Agility Brake Controller # HM47295 Reads 99 Percent Power When Brakes are Applied
  • I would recommend to make sure that you have the Hopkins Agility Brake Controller, part # HM47295 mounted correctly in your 2006 Dodge Ram truck. The brake controller needs to be mounted from minus 20 degrees nose down to plus 70 degrees nose up and parallel to the direction of the travel. Next, would be to connect your truck and trailer and test drive on a dry open area at low speed (20 to 25 mph). Apply vehicle brakes aggressively. If trailer brakes lock-up, adjust down the power setting
    view full answer...

  • Hopkins Agility Brake Controller Applies Brakes when Accelerating on a 2008 Chevy Silverado
  • There are a couple of things you can check on the Hopkins Agility Brake Controller, # HM47295. First, make sure that the red wire is connected to the correct wire on your 2008 Chevy. The 2008 model trucks and SUVs should have the wiring for a brake controller under the dash, below the steering column, and to the left of the brake pedal. The brake controller red wire should be attached to the light blue wire on the vehicle. This wire should only send power to the brake controller and out to t
    view full answer...

  • Hopkins Agility Brake Controller Power Set to 99 but Only Displays 15-20 When Brakes Applied
  • It sounds like you will need to adjust the positioning of the brake controller and then reset it as if it were the first time it was being installed. The Hopkins Agility Brake Controller, # HM47295, needs to be positioned so that it is between negative 20 degrees nose down to positive 70 degrees nose up. It also needs to be mounted in the direction of travel meaning that it can not be turned or tilted to one side. Once you have it mounted within these parameters, you can go through the set u
    view full answer...

  • Parts Needed to Install a Hopkins Trailer Brake Controller on a 1999 Chevy Tahoe
  • On a 1999 Chevy Tahoe, you will need to hardwire the brake controller, # HM47295, in order to install it. Hardwiring is not too difficult and I will include some helpful documents that explain the installation. First, if the Tahoe does not already have a 4-Way trailer connector, you will need to install one. The correct 4-Way is # 118319. I have included a link to the installation instructions for you. After you have installed the 4-Way or if you already have a 4-Way, you will then need to in
    view full answer...

  • No Signal when the Brakes are Applied After Brake Controller Installation on a 1995 GMC Pickup
  • It sounds to me as if you do not have the red brake switch wire or the black power wire from the Agility brake controller, # HM47295, connected to the correct circuit. Use a circuit tester, like part # 3808, to test the black wire first. You should have 12 volt power at all times going into the brake controller. If not you will need to find a constant 12 volt power source. We recommend using 10 gauge wire, # 10-2-1, and a 30 amp circuit breaker, # PK54530, inline on the power wire and attachi
    view full answer...

  • Will the Hopkins Agility Trailer Brake Controller Fit a 2011 Chevy Silverado
  • Brake controllers are not vehicle specific so you can use the Hopkins Agility, # HM47295, on your 2011 Chevy Silverado. On a 2011 Chevy Silverado, there will be tow package wiring for a brake controller under the dash and to the left of the steering column. The wires will be held together with a white tag that lists their functions. I have included a link to an FAQ article that explains how to make the connections. The article also talks about some connections you may need to make under the h
    view full answer...

GMC Sierra Accessories

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