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Complete CURT Class 5 2" trailer hitch and 5-flat wiring kit (with 4-way to 5-way adapter for surge brakes) engineered for the 1988 - 1999 GMC K1500 Excluding dual exhaust or 10" step bumper or. Vehicle-specific fit, plug-and-play installation, all hardware and instructions included.
This custom kit fits the following vehicles:
All Hardware and Installation Instructions Included!
When we came to the limits of towing capacity, we wanted to know what else was out there. What could we discover off the beaten path? So, we kept going. CURT class 5 Xtra Duty hitches begin a class of their own, beyond class 4 and beyond anything the standards dictate. They are designed for the hard road where only full-size pickup trucks, vans and SUVs dare to tread. They are capable of pulling almost any heavy-duty trailer, including toy haulers, dump trailers, logging trailers, small yacht trailers and more (NOTE: Never exceed the lowest weight capacity of any towing component). This particular Xtra Duty class 5 trailer hitch offers a gross trailer weight capacity of 16,000 lbs. and an extra-high tongue weight capacity of 2,400 lbs. It features a 2" x 2" receiver tube opening to accept a ball mount or hitch-mounted accessory, such as a cargo carrier or winch mount. It is designed to be a custom-fit trailer hitch for certain years of the Chevy C1500, C2500, C3500, K2500 or K3500 and GMC C2500, C3500, K2500 or K3500 (to verify compatibility with your vehicle, see application info). For a little extra towing power and stability, this class 5 hitch can also be used in combination with a weight distributing hitch. It is rated for 17,000 lbs. WD and 2,400 lbs. WDTW. In our drive to create a more powerful hitch, CURT has not neglected the finer details. Our class 5 trailer hitches are welded with precision and go through multiple stages of cleaning to create a smooth surface that is ready to accept our co-cured finish. To protect them from corrosion, chipping and UV damage, these hitches are immersed in a liquid A-coat and then finished in a high-quality black carbide powder coat. They come with grade-8 mounting hardware for solid installation.
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the GMC C1500, C2500, C3500, K1500, K2500 and K3500 (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 1988 - 1999 | GMC K1500 | Excluding dual exhaust or 10" step bumper or |
Yes, the 88 - 99 GMC K1500 Excluding dual exhaust or 10" step bumper or Curt 2" Class 5 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 15325 (Part #5W-CHW-1417) is designed to fit the 1988-1999 GMC K1500.
The 88 - 99 GMC K1500 Excluding dual exhaust or 10" step bumper or Curt 2" Class 5 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 15325 (Part #5W-CHW-1417) fits 1988-1999 GMC K1500 models. The 1999 model year is the last year covered by this part number. For newer models, check for an updated version.
The 88 - 99 GMC K1500 Excluding dual exhaust or 10" step bumper or Curt 2" Class 5 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 15325 (Part #5W-CHW-1417) fits the following vehicles: 1988-1999 GMC K1500. Always verify your specific year, make, and model before ordering.
The 88 - 99 GMC K1500 Excluding dual exhaust or 10" step bumper or Curt 2" Class 5 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 15325 (Part #5W-CHW-1417) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Yes, Curt part number 15325 is designed for 1988–2000 Chevrolet and GMC full-size pickups with long or short bed and old body style. Confirm your truck matches these specifications before purchasing.
The hitch weight is 60 lbs.
Yes. The manual requires you to lower and remove the spare tire for ease of installation. The spare tire is reinstalled after the hitch is fully installed and torqued.
Only if your truck has a factory-installed bumper. If equipped, you must remove the 12mm bumper bracket bolts from both sides before raising the hitch into position. If your truck has no factory bumper, bumper removal is not necessary.
No drilling is required. The manual states "NO DRILLING REQUIRED" and the hitch uses existing frame rail holes and slots for mounting.
You will need: a ratchet, a torque wrench, a 12-inch socket extension, a 3/4-inch socket, and an 18mm socket.
The kit includes: 4× 1/2-13 UNC 1-3/4-inch grade 8 carriage bolts (part 10-10272); 8× 1/2-13 UNC 1-1/2-inch grade 8 carriage bolts (part 10-10287); 2× M12×1.75 50mm class 10.9 hex cap screws (part 10-10458); 12× 1/2-13 grade 8 serrated flange nuts (part 20-00062); 2× M12×1.75 class 10 flange nuts (part 20-00176); 2× 1/2-inch conical toothed washers (part 30-00149); 2× 0.250×1.50×2.00-inch square hole spacers (part CM-SP1); 2× 0.250×1.50×3.00-inch square hole spacers (part CM-SP4); and 2× 0.250×1.50×1.50-inch round hole spacers (part CM-SP22).
Torque all 1/2-inch hardware to 110 ft-lbs and all 12mm hardware to 79 ft-lbs. This is the final torque specification applied in the last step of installation after all fasteners are loosely secured.
Method A assembles the center section to side plates A and B first (step 2), then raises the complete assembly into position and secures it to the frame rails. Method B installs the side plates A and B into position first (step 3), then raises and secures the receiver tube assembly to the side plates (step 6). Both methods use the same fasteners and torque specifications. The manual does not specify which method is preferred; choose the one that works best for your installation situation.
This depends on whether your truck has a factory bumper. If equipped with a bumper, align the rearmost holes in the side plates with the holes in the frame rail where the 12mm bumper bracket bolts were removed. If no bumper is installed, align the rearmost holes in the side plates with the rearmost slots in the frame rails. The manual notes to use option "C" for trucks without bumpers.
Place a 1/2-13 UNC 1-3/4-inch carriage bolt along with a CM-SP4 spacer (0.250×1.50×3.00 inch) in the forwardmost hole in each frame rail (one each side). Secure with a 1/2-13 hex flange nut. These are tightened to 110 ft-lbs in the final torque step.
Place a 1/2-13 UNC 1-3/4-inch carriage bolt along with a CM-SP1 spacer (0.250×1.50×2.00 inch) in the center hole in each frame rail (one each side). Secure with a 1/2-13 hex flange nut. These are tightened to 110 ft-lbs in the final torque step.
Use 12mm bolts with conical toothed washers (part 30-00149) and the existing weldnuts in the frame rail. These are loosely secured during the initial positioning step and tightened to 79 ft-lbs in the final torque step.
Use 12mm bolts with conical toothed washers (part 30-00149), 12mm flange nuts (part 20-00176), and CM-SP22 spacers (0.250×1.50×1.50 inch). These are loosely secured during the initial positioning step and tightened to 79 ft-lbs in the final torque step.
All fasteners are initially loosely secured during the positioning steps. They are tightened only in the final step after the hitch is centered on the vehicle: torque all 1/2-inch hardware to 110 ft-lbs and all 12mm hardware to 79 ft-lbs.
Do not exceed your vehicle manufacturer's recommended towing capacity. The manual emphasizes this as a critical safety requirement and does not specify a hitch-specific capacity limit independent of the vehicle.
After installation, reinstall the spare tire. Periodically check the hitch to ensure that all fasteners are tight and that all structural components are sound. This ongoing maintenance is essential for safe operation.
The manual requires periodic inspection to ensure all fasteners are tight and all structural components are sound. No specific interval is stated; inspect regularly as part of routine vehicle maintenance, especially before towing.
The Curt 15325 fits 1988–2000 Chevrolet and GMC full-size pickups with long or short bed and old body style only.
No, no drilling is required. The hitch uses existing frame rail holes and slots.
You need a ratchet, torque wrench, 12-inch socket extension, 3/4-inch socket, and 18mm socket.
Yes, lower and remove the spare tire before installation. Reinstall it after the hitch is fully torqued.
Torque all 1/2-inch hardware to 110 ft-lbs and all 12mm hardware to 79 ft-lbs in the final installation step.
Do not exceed your vehicle manufacturer's recommended towing capacity. The hitch capacity table in the manual is incomplete.
Yes, the Curt 55315 custom wiring harness is designed for Chevrolet C/K 1500 pickup trucks. It is also compatible with Chevrolet C/K 2500/3500, GMC C/K 1500, and GMC C/K 2500/3500 pickup trucks. The harness connects to your vehicle's existing taillight wiring harness connector.
Yes, the Curt 55315 custom wiring harness is compatible with GMC C/K 2500/3500 pickup trucks, as well as GMC C/K 1500 models. The installation process is the same across all listed applications.
The Curt 55315 kit includes a custom wiring harness with a yellow wire connector end, a white ground wire with ring terminal, a provided screw for grounding, cable ties for securing loose wires, and a 4-flat dust cover to help prevent corrosion.
The manual lists no specific tools as required. However, you will need a drill to create a 3/32" pilot hole for the ground wire screw if a suitable existing screw with nut is not available on the vehicle frame. A test light or properly wired trailer is needed to test for proper function after installation.
The manual does not specify whether the battery must be disconnected. Check your vehicle owner's manual or contact the vehicle manufacturer for guidance on electrical work preparation.
Locate your vehicle's taillight wiring harness connector. Separate the connector from the taillight housing carefully, taking care not to damage the locking tabs. Insert the custom wiring harness end with the yellow wire between the separated connectors. Push both connectors fully together until the locking tabs are in place and secure.
Locate a suitable grounding point near the taillight connector, such as an existing screw with nut in the vehicle frame. The area must be free of rust, dirt and paint. If no suitable point exists, drill a 3/32" pilot hole and use the provided screw. Secure the white ground wire using the ring terminal and the provided screw.
Drilling is required only if a suitable existing screw with nut is not available on the vehicle frame near the taillight connector for grounding. If drilling is necessary, you will drill a 3/32" pilot hole. Before drilling, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
When in use, route the 4-flat connector to the center of the vehicle and out of the trunk. When not in use, roll up the connector and store it in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
Test for proper function by using a test light or connecting a properly wired trailer to the 4-flat connector. All steps must be followed to ensure the wiring harness will function properly. If testing reveals issues, review the installation steps to confirm all connections are secure and the ground wire is properly attached.
Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating and potential fire. Refer to your vehicle owner's manual or contact the vehicle manufacturer for your specific lamp load rating.
Install the provided 4-flat dust cover to help prevent corrosion. This should be done as part of the final installation step after all other components are in place.
No, you do not need to remove the taillight housing. You only need to separate the taillight wiring harness connector from the housing by carefully disconnecting it, taking care not to damage the locking tabs. The custom harness is then inserted between the separated connectors.
Yes, if you have a Chevrolet or GMC C/K 1500, 2500, or 3500 pickup truck. The harness connects to your vehicle's existing taillight connector.
A drill may be needed to create a 3/32" pilot hole for the ground wire screw if no suitable existing screw is available on the vehicle frame. A test light or properly wired trailer is required to test the installation.
Drilling is only required if no suitable existing screw with nut is available on the vehicle frame near the taillight connector. If drilling is necessary, drill a 3/32" pilot hole. Always check for hidden items before drilling.
Do not exceed the product rating or your vehicle's lamp load rating, whichever is lower. Exceeding the rating can cause loss of warranty, overheating and potential fire.
Test for proper function using a test light or by connecting a properly wired trailer to the 4-flat connector.
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