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Fits standard 2-wire system
Warranty: One-Year Limited Warranty
Electrical System Type: 2W
Output Type: 4-Way Flat
Installation Difficulty: Novice
Installation Time Exact (Minutes): 5
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 Chevy S10, C10, C20, C30, C1500, K10, K20 and K30 pickup or Suburban and GMC S15, Syclone, C1500, C2500, C3500, K1500, K2500 and K3500 pickup or Suburban and Isuzu Hombre (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 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
26 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 1985 - 1986 | Chevrolet C10 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet C10 Suburban | Installation Time: 30-60 minutes |
| 1994 | Chevrolet C1500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet C20 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet C20 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet C30 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet K10 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet K10 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet K20 | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet K20 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | Chevrolet K30 | Installation Time: 30-60 minutes |
| 1985 - 1997 | Chevrolet S10 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC C1500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC C1500 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC C2500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC C2500 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC C3500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC K1500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC K1500 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC K2500 | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC K2500 Suburban | Installation Time: 30-60 minutes |
| 1985 - 1986 | GMC K3500 | Installation Time: 30-60 minutes |
| 1985 - 1990 | GMC S15 | Installation Time: 30-60 minutes |
| 1991 - 1997 | GMC Sonoma | Installation Time: 30-60 minutes |
| 1991 | GMC Syclone | Installation Time: 30-60 minutes |



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Yes, the CURT Custom Wiring, 4-Flat, Select S10, S15, C/K, Suburban, Syclone, Isuzu Hombre Trailer Connector Kit (Part #BKDK55312) is designed to fit the 1985-1986 Chevrolet C10.
The CURT Custom Wiring, 4-Flat, Select S10, S15, C/K, Suburban, Syclone, Isuzu Hombre Trailer Connector Kit (Part #BKDK55312) fits the following vehicles: 1985-1986 Chevrolet C10; 1985-1986 Chevrolet C10 Suburban; 1994 Chevrolet C1500; 1985-1986 Chevrolet C20; 1985-1986 Chevrolet C20 Suburban; 1985-1986 Chevrolet C30; 1985-1986 Chevrolet K10; 1985-1986 Chevrolet K10 Suburban; 1985-1986 Chevrolet K20; 1985-1986 Chevrolet K20 Suburban; 1985-1986 Chevrolet K30; 1985-1997 Chevrolet S10; 1985-1986 GMC C1500; 1985-1986 GMC C1500 Suburban; 1985-1986 GMC C2500; 1985-1986 GMC C2500 Suburban; 1985-1986 GMC C3500; 1985-1986 GMC K1500; 1985-1986 GMC K1500 Suburban; 1985-1986 GMC K2500; 1985-1986 GMC K2500 Suburban; 1985-1986 GMC K3500; 1985-1990 GMC S15; 1991-1997 GMC Sonoma; 1991 GMC Syclone; 1996-1997 Isuzu Hombre. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring, 4-Flat, Select S10, S15, C/K, Suburban, Syclone, Isuzu Hombre Trailer Connector Kit (Part #BKDK55312) fits 1985-1986 Chevrolet C10 models. The 1997 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT Custom Wiring, 4-Flat, Select S10, S15, C/K, Suburban, Syclone, Isuzu Hombre Trailer Connector Kit (Part #BKDK55312) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
The Curt 55312 T-connector is designed for Chevrolet Blazer, Chevrolet C/K Series Pickup, Chevrolet S-10 Pickup, Chevrolet Suburban, GMC C/K Series Pickup, GMC Sonoma Pickup, GMC Jimmy, GMC Suburban, GMC Syclone, and Isuzu Hombre. Verify your vehicle model matches this list before purchasing.
The taillight wiring harness location T3 is located between the driver's side frame rail and the spare tire. This is where you will insert the T-connector.
Locate the vehicle's taillight wiring harness at location T3 between the driver's side frame rail and spare tire. Separate the vehicle's connectors carefully without damaging the locking tabs. Insert the T-connector between the separated connectors, ensuring both connectors are fully inserted with locking tabs in place.
Locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle's frame. If no suitable point exists, drill a 3/32" hole and secure the white wire using the eyelet and screw provided in the kit.
Drilling is not always required. If a suitable grounding point exists near the connector (such as an existing screw with nut in the vehicle's frame), you can use that. If no suitable point is available, you will need to drill a 3/32" hole for the ground wire.
Drill a 3/32" hole if a suitable existing grounding point is not available. Secure the white wire using the eyelet and screw provided.
Route the 4-flat connector to the center of the vehicle and secure it in a convenient location that is out of the way.
Secure any loose wires using the cable ties provided in the kit.
Before drilling, verify that miscellaneous items hidden behind or under any surface will not be damaged. This precaution avoids damage to vehicle components and personal injury.
The Curt 55312 fits Chevrolet Blazer, C/K Series Pickup, S-10 Pickup, and Suburban; GMC C/K Series Pickup, Sonoma Pickup, Jimmy, Suburban, and Syclone; and Isuzu Hombre.
Drilling is optional. If an existing screw with nut is available on the vehicle frame near the connector, use that for grounding. Otherwise, drill a 3/32" hole.
The kit includes a T-connector, white wire with eyelet, screw, and cable ties. The manual does not specify additional components.
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