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Tekonsha
Verify Fitment
Select your vehicle to confirm this part fits.
2003 - 2006 Cadillac Escalade
Confirmed to Fit
2003 - 2006 Cadillac Escalade ESV
Confirmed to Fit
2003 - 2006 Cadillac Escalade EXT
Confirmed to Fit
2003 - 2006 Chevrolet Avalanche 1500
Confirmed to Fit
2003 - 2006 Chevrolet Avalanche 2500
Confirmed to Fit
2003 - 2007 Chevrolet Silverado 1500
Confirmed to Fit
2003, 2005 - 2007 Chevrolet Silverado 1500 HD
Confirmed to Fit
2003 - 2004 Chevrolet Silverado 2500
Confirmed to Fit
2003 - 2007 Chevrolet Silverado 2500 HD
Confirmed to Fit
2003 - 2007 Chevrolet Silverado 3500
Confirmed to Fit
2003 - 2006 Chevrolet Suburban 1500
Confirmed to Fit
2003 - 2006 Chevrolet Suburban 2500
Confirmed to Fit
2003 - 2006 Chevrolet Tahoe
Confirmed to Fit
2003 - 2007 GMC Sierra 1500
Confirmed to Fit
2003, 2005 - 2007 GMC Sierra 1500 HD
Confirmed to Fit
2003 - 2004 GMC Sierra 2500
Confirmed to Fit
2003 - 2007 GMC Sierra 2500 HD
Confirmed to Fit
2003 - 2007 GMC Sierra 3500
Confirmed to Fit
2003 - 2006 GMC Yukon
Confirmed to Fit
2003 - 2006 GMC Yukon XL 1500
Confirmed to Fit
2003 - 2006 GMC Yukon XL 2500
Confirmed to Fit
2003 - 2007 Hummer H2
Confirmed to Fit


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Tekonsha trailer brake controller harnesses exist to make connecting your brake controller to your vehicle as easy as possible. These custom two-plug units are specifically designed to be used with any Tekonsha brake controller. The Plug & Play feature on the Tekonsha wiring harnesses makes them easy to install. Simply plug one end of the harness into the back of your desired Tekonsha brake controller and the other end into the port in your vehicle. No cutting, splicing, or taping required.
Each wiring harness is made up of four copper wires wrapped with a braided nylon thread to insulate the wires and protect them against nicks, punctures, and elevated temperatures. The four-pin Plug & Play connectors on each end of the harness are uniquely designed, with one end to fit each vehicle based on make and model year specifications, while the other end plugs easily into any Tekonsha brake controller.
Tekonsha trailer brake controller harnesses are custom designed, giving you plenty of wire to reach between where it is connected to the vehicle and where it connects to the brake controller without stretching or straining the wires. And because Tekonsha is the leader in wiring and electrical, you can relax knowing your connections will be safe and secure, so you can hit the road with confidence! With Tekonsha, Lifes a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 301500 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.3 LBS |
| WIRE COLORS: | BLACK, RED, BLUE WHITE |
| CONNECTOR GENDER: | MALE |
| CONNECTOR SHAPE: | SQUARE |
| CONNECTOR QUANTITY: | 2 |
| TERMINAL QUANTITY: | 4 |
| TERMINAL TYPE: | BLADE |

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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22 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2003 - 2006 | Cadillac Escalade | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Cadillac Escalade ESV | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Cadillac Escalade EXT | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Chevrolet Avalanche 1500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Chevrolet Avalanche 2500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | Chevrolet Silverado 1500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003, 2005 - 2007 | Chevrolet Silverado 1500 HD | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2004 | Chevrolet Silverado 2500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | Chevrolet Silverado 2500 HD | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | Chevrolet Silverado 3500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Chevrolet Suburban 1500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Chevrolet Suburban 2500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | Chevrolet Tahoe | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | GMC Sierra 1500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003, 2005 - 2007 | GMC Sierra 1500 HD | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2004 | GMC Sierra 2500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | GMC Sierra 2500 HD | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | GMC Sierra 3500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | GMC Yukon | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | GMC Yukon XL 1500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2006 | GMC Yukon XL 2500 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2003 - 2007 | Hummer H2 | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 5 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 301500 (Part #TK301500) fits 2003-2006 Cadillac Escalade models. The 2007 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 301500 (Part #TK301500) is designed to fit the 2003-2006 Cadillac Escalade.
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 301500 (Part #TK301500) fits the following vehicles: 2003-2006 Cadillac Escalade; 2003-2006 Cadillac Escalade ESV; 2003-2006 Cadillac Escalade EXT; 2003-2006 Chevrolet Avalanche 1500; 2003-2006 Chevrolet Avalanche 2500; 2003-2007 Chevrolet Silverado 1500; Chevrolet Silverado 1500 HD; 2003-2004 Chevrolet Silverado 2500; 2003-2007 Chevrolet Silverado 2500 HD; 2003-2007 Chevrolet Silverado 3500; 2003-2006 Chevrolet Suburban 1500; 2003-2006 Chevrolet Suburban 2500; 2003-2006 Chevrolet Tahoe; 2003-2007 GMC Sierra 1500; GMC Sierra 1500 HD; 2003-2004 GMC Sierra 2500; 2003-2007 GMC Sierra 2500 HD; 2003-2007 GMC Sierra 3500; 2003-2006 GMC Yukon; 2003-2006 GMC Yukon XL 1500; 2003-2006 GMC Yukon XL 2500; 2003-2007 Hummer H2. Always verify your specific year, make, and model before ordering.
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 301500 (Part #TK301500) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The adapter is designed for vehicles equipped with a black Electric Junction Box located underneath the dashboard, left of the steering column, just above the carpet. All vehicles with this factory provision have a location for the adapter, but not all have complete connections to the battery and wiring to the rear for electric trailer brakes. To confirm fitment, locate the Electric Junction Box and check for the mating connection point in the top row, second from the left. If you cannot locate this box or connection point, the adapter may not be compatible with your vehicle. Consult your vehicle's owner's manual or contact the manufacturer for confirmation.
The adapter (part number 18283-037) is a connector that plugs into your vehicle's factory Electric Junction Box to enable electric trailer brake control. It serves as the interface between your vehicle's electrical system and an electric brake control unit, allowing you to control trailer brakes from inside the vehicle. The adapter must be plugged into the mating receptacle on the backside of the brake control before attaching to the vehicle connector.
The black Electric Junction Box is located in the interior of the vehicle underneath the dashboard, left of the steering column, just above the carpet. You will need to remove the cover to access the mating connection point for electric trailer brakes, which is located in the top row, second from the left.
First, plug the brake control adapter into the mating receptacle on the backside of the brake control unit. Then, plug the adapter into the mating connection in the Electric Junction Box. This sequence ensures proper connection before the adapter is attached to the vehicle connector.
After plugging the brake control adapter into the mating connection in the Electric Junction Box, carefully probe the adapter with a circuit tester to verify that battery (+) power is supplied to it. This confirms the adapter is receiving power from the vehicle's electrical system.
If your vehicle has no power supply to or from the Electric Brake Control Adapter, you must use an Electric Brake Control Wiring Kit. This kit includes the necessary wires and components to route power from the vehicle's electrical system to the adapter. Follow the wiring kit installation instructions to route all wires to the wire locations provided, or follow the brake control manufacturer's instructions.
Open the vehicle's hood and locate the black Electrical Center Box on the driver's side. Remove the box lid and cover to expose the vehicle's brake control feed wire (blue). This will require temporary removal of the vehicle's support brace. Attach and route all wires as described in the wiring kit installation instructions.
In the same location as the brake control feed wire, locate the vehicle's battery (+) supply wire (red) in the black Electrical Center Box on the driver's side. Attach and route all wires as described in the wiring kit installation instructions. After installing the wiring kit, reinstall the Electrical Center Box cover, lid, and support brace.
Yes. An in-line fuse or circuit breaker is required for the Electric Brake Control Wiring Kit installation. This protects the circuit from overload and fire hazard.
After plugging the brake control adapter into the vehicle's electric brake control harness connector, follow all brake control manufacturer's installation instructions. Complete the installation per the electric brake control manufacturer's instructions, mount the unit as directed, and perform all test procedures as instructed by the brake control manufacturer.
Do not exceed the lower of your towing manufacturer's rating or the following: maximum 4 axles with 8 brakes (24 amps). Overloading the circuit can cause fires. Consult your vehicle's owner's manual and instruction sheet for additional information about your specific towing capacity.
Perform all test procedures as instructed by the electric brake control manufacturer. The manual does not specify the exact tests, so refer to your brake control unit's installation instructions for the complete testing procedure.
No. The adapter requires a factory black Electric Junction Box underneath the dashboard, left of the steering column. Not all vehicles have this provision or complete electrical connections for electric trailer brakes. Locate the junction box to confirm compatibility.
An in-line fuse or circuit breaker is required only if you are using an Electric Brake Control Wiring Kit to complete the installation. If your vehicle already has complete connections to the battery and wiring to the rear, no additional fuse is required for the adapter itself.
Plug the adapter into the backside of the brake control unit first, then plug it into the Electric Junction Box in your vehicle. Do not reverse this order.
Maximum 4 axles with 8 brakes (24 amps). Do not exceed this limit or your towing manufacturer's rating, whichever is lower, as overloading can cause fires.
Yes, if you are using an Electric Brake Control Wiring Kit, you must temporarily remove the vehicle's support brace to access the Electrical Center Box and the brake control feed wire (blue). Reinstall it after completing the wiring kit installation.





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