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2003 GMC Sierra Accessories

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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


  • 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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  • Dimensions of the Rackem Helmet Rack # RA-22
  • I went out into our warehouse to get the dimensions of the Rack'em Motorcycle Helmet Rack # RA-22 that you referenced and found that the overall height is 20-1/4 inches, the depth is 9-1/4 inches not including the 2 inch hook, and the overall width is 5 inches.
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  • Availability of Separate 5th Wheel Slider Assembly for ProSeries 20K Hitch
  • Yes, we do offer a stand-alone slider assembly that will work with your Pro Series 20K hitch. The part number you need is # RP30092 and its written instructions are linked for you at right, along with an installation video. This slider is a great way to improve low-speed turning clearance for short bed trucks like your 2003 GMC Sierra. It provides 10-inches of front-to-back travel and will fit any industry-standard base rails from Reese, Pro Series, Curt, Valley, Draw-Tite and Hidden-Hitch.
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  • Fifth Wheel Hitch Adapter Recommendation for a B and W Turnover Gooseneck Hitch
  • No, the Curt X5 Fifth Wheel Adapter for B and W Square Shank Turnover Ball Hitches # 16310 that you referenced will not work with Husky 16k Roller hitches. If you have a B and W Turnover gooseneck hitch installed on your vehicle you would need to get the B&W Companion Slider Gooseneck-to-5th-Wheel Trailer Hitch Adapter # BWRVK3400.
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  • Slider Hitch Recommendation for a 2003 GMC 2500HD with a B and W Turnover Ball
  • The Curt X5 Gooseneck to 5th Wheel Adapter part # 16310 would work well in the B and W Turnover Gooseneck hitch you have installed in your 2003 GMC 2500HD but it is not compatible with your Husky 16k Slider Hitch. Your best option would be to go with a B and W Companion hitch with a slider, part # BWRVK3400. You could use the X5 and then also get a different slider hitch, but by the time you buy a new slider hitch and the X5 the # BWRVK3400 would give you a better hitch at the same...
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  • Troubleshooting Intermittent Trailer Light Operation When Coupler Moves on Hitch Ball
  • From your description of the problem - your trailer's lights blinking on and off as the coupler moves around on the hitch ball - it sounds like you have a grounding issue. A weak or inconsistent ground connection is often the cause for a whole range of odd lighting behavior on trailers. It sounds like the ground wire on your trailer harness and/or the ground wire on the Sierra may not be making a clean secure ground connection to the trailer and vehicle frames. This means that the ground...
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  • Troubleshooting Trailer Brake Controller on 2003 GMC 2500HD Sierra 4x4
  • When troubleshooting the brake controller on your 2003 GMC 2500HD 4x4, I would first start out by using a circuit tester like the Quickee, # 3808, to ensure that the red wire coming from the brake controller has power when the brake pedal is pressed. If the red wire does not have power, a problem most likely exists with the wiring harness or somewhere on the truck. If the red wire does have power, then you most likely have a faulty brake controller and it will need to be replaced. In...
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  • How to Clean 4 Way Connections Points
  • The easiest way would be to get a can of Coca-Cola and pour it on the 4 way and watch as the corrosion disappears. A little bit of dielectric grease like part # 11755 would help prevent future corrosion if applied to the contact points. I attached an FAQ on dielectric grease for you to check out as well.
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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 is no exception, and although it does include polyurethane cushions that act as shock absorbers, it 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 offer you a long-term solution. Unless...
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  • Getting 12 Volt Power to 7-Way Trailer Connector on a 2003 GMC Sierra
  • To get the 12 volt circuit working on the 7-Way trailer connector on your 2003 GMC Sierra you will first need to go under the hood and remove the covers on the power distribution box. After removing the main cover and the cover under that you will see a post on the passenger's side front corner. There will need to be a 40 amp fuse in the nearest location to that post. If there is no wire attached to that post then you will need to follow the help article I have linked to the right. Step...
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  • Blue Ox Gooseneck Hitch Recommendation for a 2003 GMC Sierra Short Bed
  • Your question came in totally blank, but it looks like you ran a 2003 GMC Sierra 2500 with a 6-1/2 foot bed through our fitguide and referenced the Blue Ox Diamond hitch part # DH1301, so if your question is if the two are compatible the answer is yes, the hitch you referenced will fit your 2003 GMC Sierra. I attached an install video for you to check out as well.
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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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  • Retracted and Extended Height of Pro Series 8k Square Swivel Trailer Jack
  • On Pro Series trailer jack # PS1400860383 it measures 17-1/8 inches from the center of the bracket to the bottom of the foot when retracted. It is 27-1/8 inches when extended. I have included a link to a video review of this jack for you.
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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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  • Peak Backup Camera Monitor LED Blinks and Shows Blue Screen on 2003 GMC Sierra 2500
  • According to our contacts at Peak, and when the blue LED is blinking, and you do not have a picture, it indicates the monitor has power but it is not receiving a signal from the transmitter. This can happen for several reasons. If the truck is on and in reverse and the LED is still blinking and you have no picture, then you need to look at the transmitter. The transmitter needs to have a fairly clear transmission path to the monitor. The closer the transmitter is to the monitor, the...
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  • Can Both 7-Way and 4-Way Be Used at Same Time on Pollak 7- and 4-Pole Trailer Connector
  • There is power running to both sides at the same time on the Pollak 7- and 4-Pole Trailer Connector # HM40975. However, using both at the same time could result in over drawing power which could lead to blown fuses, electrical fire, accessories not working and so on. It is not recommended so use caution.
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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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  • 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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  • Is Bottom Mirror of K-Source Custom Towing Mirrors Flat or Convex and Adjustable for 2003 GMC Sierra
  • I spoke with my contact at K Source and the bottom mirror in custom towing mirror set # KS62075-76G is convex and the top mirror is flat. It is the same for both sides. The bottom mirror is manually adjustable. The top mirror is electrically adjustable if the truck has that feature.
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  • Do the K-Source Custom Fit Replacement Towing Mirrors Vibrate More than Factory Mirrors
  • Because the K-Source replacement towing mirrors # KS62075-76G mount to the same location as the factory mirrors, vibration should not be any greater than with the factory mirrors. Vibration can be an issue with universal mirrors and clip-on towing mirrors in part because you have one part mounted to another which adds a point of possible movement. Since these mirrors mount in place of the OEM mirrors you will not have that extra link in the chain.
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  • Suspension Enhancement for a 2003 GMC Sierra 1500HD 4x4 Quadrasteer
  • The cab style in this case is not going to matter. The Quadrasteer limits things a little but there is a kit that will work. You can use # TGMRCK15S on your 2003 GMC Sierra 1500HD. I have included a link to a video showing an actual installation on a 2005 model and a link to the installation details for you.
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  • Tracking Down Wiring Problem on Trailer Towed by 2003 GMC Sierra
  • Having the right and left turn signals flashing at the same time indicates a ground problem. Make sure the ground connection on the trailer is secure and not corroded. The trailer connector will usually have a white wire leading from it that grounds somewhere on the trailer frame, usually on the trailer tongue. The trailer lamps will ground to the trailer frame in one of two ways, either through their attachment studs being in direct contact with the trailer frame or by a separate ground...
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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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  • Under-Bed Install Kit for a 2003 GMC Sierra 3500 that works with a Draw-Tite 16 K Fifth Wheel Head
  • I have confrirmed with my contacts at Reese and both the under-bed rail kits # RP30082 and # RP30062 are considered a fit your 2003 GMC Sierra 3500 with a Duramax dually with an 8 foot bed. The # RP30082 install tech tips indicate that no drilling is required for the installation of the frame brackets. It utilizes existing frame mounting holes already on your truck. Where as the # RP30062 installation tech tips indicated that two holes will need to be drilled to install each frame...
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  • Parts Needed to Flat Tow a 2003 GMC Sierra with a Roadmaster Falcon 5250 Tow Bar
  • The first thing you are going to want to do is consult the truck owners manual for specific information on flat towing it. There are different configurations of the 2003 GMC Sierra 1500 and would require different base plates. If you have a Z71 model and the front suspension uses a torsion bar use # 199-6 or # 199-5. If you have an HD model (torsion or coil springs) use # 3115-1 or # 3115-3. If you do not have a Z71 or HD and have coil springs in the front use # 199-10 or # 199-11. Any...
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  • 5th Wheel to Gooseneck Adapter for a 2003 GMC Sierra 3500 Crew Cab with Curt Gooseneck Hitch # C-52
  • I may have an option that will work for you, however, the Curt X-5 Gooseneck to Fifth Wheel Adapter, # C16210, will not fit in the Curt Folding Ball Gooseneck Hitch, # C-52, that you have installed in your 2003 GMC Sierra 3500. The X-5 adapter was designed to work with the Curt Double Lock, Flip and Store Gooseneck Hitch, # C60625. We do have other fifth wheel to gooseneck adapters that should work for you. One of our most popular adapters is the Convert-A-Ball Cushioned Fifth Wheel...
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  • Troubleshooting a Voyager Brake Controller for No Lights When Brake is Applied
  • Have you tried testing the controller with the trailer connected and the truck moving? The vehicle needs to be moving for the controller to work. Otherwise you might need to set the level of the controller. I attached a picture that I took from the troubleshooting chart of the installation instructions that covers the issue you are having with this controller.
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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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  • 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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  • Fit of Draw-Tite Class III Hitch # 41938 on 2003 GMC Cab/Chassis with Service Body
  • It is very difficult to provide a definite yes or no answer about hitch fit when a service body is involved. I can provide you with some measurements and parameters that would allow you to take some measurements from your truck and determine if the hitch will fit. First of all, your frame must measure 34 inches, outside to outside distance. If you measure from the rear of the frame member toward the front of the vehicle, you must have at least 19 inches of open and unobstructed frame...
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