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Tekonsha
Verify Fitment
Select your vehicle to confirm this part fits.
2019 Chevrolet Silverado 1500 LD
Confirmed to Fit
1999 - 2025 Ford F-250 Super Duty
Confirmed to Fit
2011 - 2025 Ford F-350 Super Duty
Confirmed to Fit
2011 - 2025 Ford F-450 Super Duty
Confirmed to Fit
2007 - 2018 GMC Sierra 1500
Confirmed to Fit
Confirmed to Fit
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Allows remote wiring in pickup beds or other hard to access areas when towing a fifth wheel or gooseneck trailer, using an OEM USCAR connector. Features durable plastic housing with weather tight seal.
| BRAND: | TEKONSHA |
| PART NUMBER: | 20110 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 2.61 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| LENGTH: | 84 IN. |
| WIRE QUANTITY: | 7 |
Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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6 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2019 | Chevrolet Silverado 1500 LD | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes |
| 1999 - 2025 | Ford F-250 Super Duty | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes With Factory 7: Way 7 ft. Length Clamshell |
| 2011 - 2025 | Ford F-350 Super Duty | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes With Factory 7: Way 7 ft. Length Clamshell |
| 2011 - 2025 | Ford F-450 Super Duty | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes With Factory 7: Way 7 ft. Length Clamshell |
| 2007 - 2018 | GMC Sierra 1500 | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes With Factory 7: Way 7 ft. Length Clamshell |
| 2019 | GMC Sierra 1500 Limited | 7: Way Fifth Wheel Adapter Harness Drilling Required Install Time is 45 minutes |
The Trailer Tow Harness 20110-037 is an adapter harness that connects between your vehicle's factory 7-way connector and your trailer's wiring harness. It allows your vehicle's electrical system to communicate with your trailer's lights and brake controls. All connections must be complete for the harness to function properly.
The Trailer Tow Harness 20110-037 is designed for vehicles with a factory 7-way harness connector located on or near the rear bumper. If your vehicle has this connector, the harness will fit. Note that the Dodge version of the connector is rectangular. If you are unsure whether your vehicle has a factory 7-way connector, consult your vehicle's owner's manual or contact the manufacturer.
You will need: a drill with 3/32" and 1/4" drill bits, a 2" hole saw, a Phillips head screwdriver, and a center punch. Safety glasses are also required during installation.
The harness includes 4 self-tapping screws for mounting the 7-way connector to the vehicle surface and cable ties for securing the harness to the vehicle. Rust-proof coating and dielectric grease are not provided but are recommended.
The mounting point is usually on the driver's side between the rear post and the wheel well area. You must have at least 5" of clearance behind the mounting surface for installation. Ensure the trailer's wire harness has adequate length to reach this point, and leave approximately 4" or more of extra harness length for the final connection in Step 5.
The manual does not specify whether the battery must be disconnected. Consult your vehicle's owner's manual or the manufacturer for guidance on this safety requirement.
Yes, drilling is required. You must drill a 1/4" pilot hole, then use a 2" hole saw to create the main mounting hole. After the mounting hole is complete, you will drill four 3/32" holes for the self-tapping screws. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury. Do not drill into exposed surfaces.
Drill a 1/4" pilot hole first, then use a 2" hole saw to create the main mounting hole. After routing the harness through the mounting hole, mark and drill four 3/32" holes for the self-tapping screws.
If your vehicle has a bedliner, you will need to notch it, or use a longer set of screws (not provided) and mount directly into the bedliner and body panel. The standard 4 self-tapping screws included may not be long enough to penetrate both the bedliner and the vehicle body.
Yes, the manual recommends using rust-proof coating in drilled areas to prevent future rusting. This coating is not provided with the harness and must be purchased separately.
Locate your vehicle's 7-way factory harness on or near the rear bumper. Separate the connector carefully, being careful not to break the locking tabs. Ensure the mating surfaces are free of dirt and clean if necessary. Install the Trailer Tow Harness between the mating plugs. The Dodge version connector is rectangular.
Route the harness through the mounting hole and connect the 7-way end to the harness. Using the 4 self-tapping screws provided, mount the 7-way harness to the vehicle surface. The exact torque specification for these screws is not provided in the manual.
Route the wire carefully to avoid any hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire. Secure the harness to the vehicle using the cable ties provided. Ensure the wire has adequate clearance from heat sources and moving parts.
On some vehicles you may need to add a fuse or relay (not provided) to complete all of the functions going to the 7-way connector. Consult your vehicle's owner's manual for the specific locations and part numbers required for your vehicle.
Yes, when plugging in the wiring harnesses and other connectors into 7-way connectors at the rear of the vehicle, use dielectric grease to seal the connection. This will keep moisture from compromising the connection and potentially setting off an error code on brake controls and preventing plug corrosion. Dielectric grease is not provided and must be purchased separately.
All connections must be complete for the Trailer Tow Harness to function properly. Test and verify installation with a test light or trailer once installed. This will confirm that all electrical connections are working correctly.
Wear safety glasses during installation. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury. Do not drill into exposed surfaces. Route the wire carefully to avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
The 20110-037 fits vehicles with a factory 7-way harness connector at or near the rear bumper. Check your vehicle's owner's manual to confirm you have this connector.
You need a drill with 3/32" and 1/4" bits, a 2" hole saw, Phillips screwdriver, center punch, and safety glasses.
Yes. You must drill a 1/4" pilot hole, then a 2" mounting hole, then four 3/32" holes for screws. Before drilling, verify what is behind the surface to avoid damage.
You will need to notch the bedliner or use longer screws (not provided) to mount through both the bedliner and body panel.
The harness includes 4 self-tapping screws and cable ties. Rust-proof coating and dielectric grease are recommended but not provided.
Some vehicles require an additional fuse or relay (not provided). Consult your vehicle's owner's manual for locations and part numbers.
Test with a test light or trailer to verify all connections are working. Use dielectric grease on all 7-way connectors to prevent moisture damage.
If an error code is found on the brake controls, the error codes will reset to normal after the connectors are disassembled and dried out. This typically occurs due to moisture compromising the connection. Ensure you are using dielectric grease on all 7-way connectors to prevent moisture from entering the connection.
All connections must be complete for the Trailer Tow Harness to function properly. Verify that all electrical connections are secure and complete. Test with a test light or trailer to identify which connections are not working. Check that any required fuse or relay (per your vehicle's owner's manual) has been installed. Ensure dielectric grease has been applied to all 7-way connectors.
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