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2003 GMC Sierra Videos

Firestone Ride-Rite Air Helper Springs Installation - 2003 GMC Sierra

Today on our 2003 GMC Sierra 2500HD Extended Cab, we're going to be installing the Firestone Ride-Rite Air Helper Springs for the rear of the vehicle, part number F2250. Now with our stock suspension setup and no airbags installed, we're going to go ahead and take a couple measurements. We're going to measure from the ground to the bottom of the wheel well. Looks like we have 41 inches. With no weight in the bed of the truck, in the stock suspension we have 41 inches of height. Now, let's go ahead and install our water tank into the bed of the truck. Now that we've added our water tank to the bed of the vehicle, we've added a little over 1500 pounds to the bed of vehicle. Now, we are at about 38-1/2 inches from the ground to the bottom of the wheel well.



Tekonsha Prodigy RF Wireless Trailer Brake Controller Installation - 2003 GMC Sierra

Today on our 2003 GMC Sierra 1500, as well as our enclosed trailer, we're going to be installing the Tekonsha Prodigy RF Wireless Trailer Brake Controller, part number 90250. We're going to go ahead and start here underneath the hood of the vehicle. We're going to need to gain access to the underside of this fuse box and we need to hook up our wire. Now, this particular truck does not have the 12-volt power supply of the 7-way hot yet. That's the reason why we're going to need to get into this fuse box. To do that, we're going to need to remove these 4 bolts here, as well as lift this bracket out of the way. Next, we're going to go ahead and lift the cover off our fuse box.



Trailer Hitch Installation - 2003 GMC Sierra - Curt

Today in our 2003 GMC Sierra well be installing the Curt hitch, part number 13322. Here is what our hitch will look like once installed.Next were going to give a couple of measurements to assist you in selecting accessories for your new hitch. From the center of the hitch pinhole, to the outermost edge, to the bumper is 2 inches. From the top of the receiver tube opening to the ground is 17 inches. This will assist you with selecting accessories such as a ball mount, bike rake or cargo carrier. Now well ahead with the installation. To begin our install well first quick point out the attachment points.



Cipa Clip-On Towing Mirror Installation - 2003 GMC Sierra

Today on our 2003 GMC Sierra 1500, we're going to be doing a test fit of the CIPA Clip-on Towing Mirror, Part Number 7070. Now, this here is what the mirror looks like. It is a universal fit, so it can fit either on the driver or the passenger's side. We're going to be installing here on the driver's side today. Now, it has different movement here to accommodate many different style and size mirrors. We also have two straps here that are adjustable. They can be shortened or pulled out longer depending on your mirror. The head of the mirror itself pivots, so it's adjustable in many different angles. Let's go ahead and show you how it connects here on our 2003 GMC Sierra pickup truck. Now, we'll go ahead and take the little tabs here on top and bottom with the arms.



Trailer Brake Controller Installation - 2003 GMC Sierra

Today on our 2003 GMC Sierra, we'll be installing the Tekonsha Prodigy P2 brake controller, part number 90885. We'll be using this brake controller in conjunction with the Tekonsha direct fit plug-in wire adapter, part number 3015-P. First we'll need to remove the cover on the manufacturer's junction box. We'll remove the plastic nut and then the cover. Located on the top row, second set of connection pins from the left will be a direct fit plug for our Tekonsha plug-in wiring adapter. While I plug into it, we'll start routing the wire over to our brake controller location, which will be towards the center of the vehicle just to the right of the gas pedal.



Thule Traverse Roof Rack Installation - 2003 GMC Sierra

Today we are going to review part number TH480 from Thule. This is Thules traverse foot pack. And we will also be using fit kit part number THKIT1522. And the cross bars we will be using on this demonstration will be THLB58. Those are sold separately. And we will be taking these parts and will be installing these on a 2003 GMC Sierra extended cab pickup truck. We have our parts here laid out with just one end of the bar so you will not get confused. We will flip the whole assembly over so you can see it easier. We are going to start off with our tower here. To slide it onto the bar, what we are going to have to do is loosen this clamp up. So we pull back on this latch right here. Then we can slide our bar in. We will just leave that loose for now. We are going to pop on our little cap. We are going to need to open up this door here. It just snaps open. And while we are here, we will use this tool to tighten down this screw which actually will clamp it down to the car. Then next we will go ahead and install the fit kit itself. 1:00





2003 GMC Sierra Questions and Answers


  • Comparison of Gooseneck and 5th Wheel Hitch For 2003 GMC Sierra 2500 HD Diesel Truck
  • Yes, there are fifth-wheel to gooseneck adapters and we do carry them. Gooseneck hitches are typically used to haul construction or agricultural trailers and fifth-wheel hitches are mainly used to haul campers. Gooseneck hitches are usually rated to haul 25,000 to 30,000 pounds, some fifth-wheel hitches are capable of doing the same, but other fifth-wheel hitches are rated lower. When towing, your towing setup is only as strong as the weakest towing component, whether it is your hitch,...
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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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  • Can Transmitter on Peak Wireless Back-Up Camera # PKC0RB Be Mounted Behind Tail Light Assembly
  • The closer you can get the transmitter to the monitor, the better your reception will be and the less interference you will get. Wireless back up cameras operate at 2.4 GHz, which is a pretty common frequency. The closer the transmitter is to the monitor the more stable the picture. You might be able to mount it behind the tail light assembly, but I would try to get it in the cab. It is recommended to keep the transmitter out of the elements. The wire from the camera to the transmitter...
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  • How To Install Safety Chain Attachment U-Bolts With Ranch Hitch Gooseneck to 5th Wheel Adapter
  • Which U bolts you will need, depends on the manufacturer of your gooseneck hitch. If you have Curt Quick Goose 2 Gooseneck Hitch, you will need Safety-Chain U-Bolt Kit for Curt Quick Goose 2 Gooseneck Hitch, part # C113. If you have a Reese or Draw-Tite Remov-A-Ball Goosneck Hitch, you will need Replacement U-Bolt Safety Chain Kit for Remov-A-Ball Gooseneck Hitch, part # 6308. You could also install part # 6308 in your truck bed to use with other brand gooseneck hitches. You would...
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  • Towing Mirror with Maximum Extension for 2003 GMC Sierra 2500
  • The Longview Towing Mirror, part # CTM1500 would extend just a bit more farther than the CIPA # 10801 and 10802 you are currently using. If you look at the provided photo I provided, you can see that the CIPA product extends 5-1/2 inches beyond the edge of the factory mirror while the Longview # CTM1500 extends by 5-1/8 inches. I do not believe the 3/8 inch larger extension offered by the Longview mirror would make much difference to you. Even a Custom Extendable Towing Mirror like part...
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  • Suspension Enhancement for a 2003 GMC Sierra 2500 HD Hauling a Trailer and Truck Bed Camper
  • The Timbren Rear Suspension Enhancement System is a great way to assist your trucks suspension when carrying a camper and towing. I use a set of the Timbren springs on my truck when I tow and I would recommend them for anyone towing a trailer or carrying a camper. The Timbren System, # TGMRCK25S, is the correct system for your 2003 GMC Sierra 2500 HD Crew Cab 4X4. The important thing to remember when adding a rear suspension enhancement system is that it will not increase the weight...
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  • Tongue Weight Capacity when Using Titan Trailer Hitch Extension RP45292 with Weight Distribution
  • A weight distribution system is used to more evenly distribute the weight of the trailer to all axles of the trailer and tow vehicle. When using the extension, # RP45292, the tongue weight capacity is going to depend on the length the extension is cut to. If it is cut down to 24 inches, the tongue weight capacity 600 pounds. At the 34 inch length the capacity is 450 pounds. It does not sound like you have a weight distribution if you are using the extension and a ball mount and are connected...
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  • Left Brake Light and Turn Signal not Working on Trailer Towed by 2003 GMC Sierra
  • I suspect that you have a blown fuse. The fuses that manage your towing circuits are located in the power distribution box located under the hood of your truck. The box sits on the inside fender on the drivers side. Your owners manual should be able to tell you which particular fuse to look for. Once you replace the fuse, you will need to determine why the fuse blew. Carefully examine your trailer connector for corrosion or damage. Check your left turn/ brake light wiring on the...
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  • Will Stromberg Carlson Follow Leg Landing Gear Repair Kit Fit Venture Landing Gear
  • More than likely, yes. The landing gear from Stromberg Carlson, Venture, and other companies is made by Lippert so it very likely that the follow leg repair kit, # LG-146060, will fit your Venture landing gear.
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  • Troubleshooting a Sticking Handle On a Reese 16k 5th Wheel Hitch
  • The 16K Fifth Wheel Hitch by Reese, item # 30047, has a groove in the handle that a latch rotates into. If the latch is not rotated toward the rear of the truck then the handle will not move and hitching should not be possible. If the latch was not rotated and hitching was attempted then some of the handle parts could have been bent. During normal hitching you should not move the handle out. You should back the truck slowly into the trailer and allow the hitch to move the handle out. Once...
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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 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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  • Fifth Wheel Hitch Positioning in 2003 GMC Sierra Short Bed
  • The installation instructions for the standard 5th wheels hitches (by Hidden Hitch, Draw Tite and Reese) indicate that the front rail needs to be placed 47 1/2 inches from the lip or end of the truck bed (before the tailgate). These instructions for the 2003 GMC 2500HD short bed truck are available for your review on on line and are guidelines only. Actual installation is the responsibility of the installer and the owner. Always measure the truck and trailer before installing the hitch...
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  • How to Correct Surging or Bucking When Towing 5th Wheel Trailer Using Gooseneck Adapter
  • Any type of adapter will introduce some degree of additional motion, noise and/or vibration in a towing system. The Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter # CAB-C5G that you referenced and the offset version # CAB-C5GX1216 are no exceptions, and although these do include polyurethane cushions that act as shock absorbers, they will not deliver the same performance as a system without adapters. There is no quick-fix to the ride quality issues you're experiencing, but we can...
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  • Front Hitch Recommendation for a 2003 GMC Sierra 3/4 ton Truck
  • Between the two hitches the one that is confirmed to fit your 2003 GMC Sierra 3/4 ton truck would be the # 31108. The # 31302 that you also referenced is designed to fit only the 1500 LD models so it wouldn't be the correct hitch for you. That is the difference between the two part numbers.
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  • Trailer Running Lights Not Working Behind a 2003 GMC Sierra
  • The first thing to do is check the underhood power distribution box. This box contains the fuses that manage your towing circuits. Please refer to your vehicle owner manual for individual fuse location. If the fuses are OK, then you will have to narrow down the problem to the trailer or the tow vehicle. Use a circuit tester, like part # 40376, and check each pin on your trailer connector while the corresponding function is activated. When you test the pin that connects to the brown trailer...
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  • Tailgate Lift Assist System for a 2003 GMC Sierra 1500
  • For a lift assist, you can use Hopkins EasyLift, # 74211 and it takes up 80 percent of the weight of the tailgate. I have linked a video review of this system for you. Or for a Tailgate lowering system for a 2003 GMC Sierra, you would need part # DZ43100. I have included a link to the installation instructions for you to view.
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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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  • Replacement Drivers Side Mirror For 2003 GMC Sierra 2500
  • We do have a drivers side mirror for your 2003 GMC Sierra, but the CIPA Replacement Mirror # CM27352 you referenced is not a compatible fit. The most recent GMC Sierra the # CM27352 will fit is the 2002 model. For your vehicle, I recommend the CIPA Replacement Mirror # CM27376, a direct replacement for your Sierras mirror OE # 15048182. The installation is pretty easy as it bolts to existing mounting holes using existing hardware and it comes with a 1-year warranty.
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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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  • Fifth Airborne Air Ride Coupler with Sidewinder for a Leland 7910 Pin Box
  • Since you have a Leland 7910 pin box on your trailer, you can use the 5th Airborne with Sidewinder Premium Fifth Wheel Air-Ride Coupler, # ST400-5AS16K, that you have referenced. This model is rated for 16,000 pounds. These units do not come with hardware for mounting. You will need to provide your own hardware. The old hardware should not be used. Make sure to use the same size as the old hardware and that it is grade 5. The units do come with the universal wedge that works with...
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  • Location to Install Brake Controller Power Fuse on 2003 GMC Sierra
  • I am assuming you are speaking of the fuse that activates the power feed to the brake controller. The 30 amp fuse is installed in the power distribution box as shown in the photo I have edited. The power distribution box is located under the hood, on the drivers side on the fender well. I have linked you to an FAQ article that describes how to install a brake controller on a 2003 GMC Sierra.
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  • Replacement 7-Way Trailer Connector Mounting Bracket for a 2003 GMC Sierra 2500HD
  • We do have a bracket that may work for you, # PK12711U, but it is designed to hold a 7-Way that mounts to a bracket using 4 screws. The other option is to replace the 7-Way using # 30955 which includes a 7-Way and a 4-Way and has a bracket.
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  • Will the K-Source Custom Extendable Towing Mirrors Heat/Electric work on 2003 GMC Sierra w/o Heat
  • Yes, the K-Source Custom Extendable Towing Mirrors w/ Turn Signals # KS62075-76G that you referenced will still install on your 2003 GMC Sierra that has electric mirrors without heat, but since your vehicle is not equipped for the heat function the mirrors would not heat. Basically these mirrors will function exactly like your factory mirrors.
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  • How Long is the Fixed End of Snap-Loc E-Track Tie-Down Strap SLLS28CER
  • I went out to the warehouse and pulled a Snap-Loc E-Track Tie-Down Strap # SLLS28CER to measure the fixed end. The overall length is 9-1/2 inches. If measuring from the end of the buckle though it is shorter, measuring about 8-3/4 inches long.
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  • Will the Universal Sidewinder Wedge Work on a Reese 5th Wheel Trailer Hitch
  • In most cases, the universal wedge that comes with the Sidewinder will work. For a Reese 16k hitch like # RP30051, the universal wedge is all you will need. Keep in mind that the hitch will need to always remain locked in the towing position and never slid forward with the Sidewinder installed. Doing so would create problems with too much stress on the system, move the trailer weight too far behind the rear axle of the towing vehicle, and could interfere with the truck tailgate.
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  • Troubleshooting Tail Lights and Weak Electric Brakes
  • You will need to use a circuit tester , item # 3808 if you need one, to test the connector on the vehicle to be sure your taillight circuit is working. If not you may have a blown fuse on that circuit or a short somewhere between the taillights and the connector. If your vehicle checks out ok then you will need to check the wiring on the trailer with the circuit tester to see where the problem is. Be sure to check all ground connection points on the vehicle, trailer and trailer lights also. It...
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  • Dimensions of Bully Black Bull LED Hitch-Mounted Step
  • I went out to the warehouse and pulled the Bully Black Bull LED Hitch-Mounted Step, part # BBS-1104L, and took some measurements for you. Take a look at the image of the dimensions and the video I made for you at right. From the last pin hole closest to the step, to the step itself the measurement is 3-1/8 inches. The measurement from the last pin hole to the end of the step where the LED is measures 6-1/2 inches. Check out the video review of this Hitch Mounted Step I have included...
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  • Folding Gooseneck Trailer Hitch with Install Kit # 8339-4434 Includes Everything for Installation
  • The Fold Down Gooseneck Trailer Hitch with Installation Kit, # 8339-4434, comes with everything need to install it in the bed of your truck including all the hardware and underbed rails. I do recommend adding the Fold Down Gooseneck Hitch Installation Template, # 6425, to make installation go quicker and easier. I have included a link to the installation details for reference.
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  • Oval Tube Step Recommendation for a 2003 GMC Sierra Extended Cab
  • I checked with Westin and the Westin Platinum Series Oval Nerf Bars # 21-1680 are confirmed to fit your 2003 GMC 1500 extended cab. I think this would be a great option for you. There are several different style of tube steps available for your vehicle. I attached a link to a page that will show all of them. The differences in prices is based on the thickness of the tubes and the materials used.
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