When you tow, your truck's trailer wiring has one job: connect your trailer's brake control to the truck reliably, every time you hook up. If the harness is damaged, short, or simply the wrong one for your setup, you're left guessing at the worst possible moment: on the road with a loaded trailer behind you. A proper replacement or extension takes that guesswork away.
What This Part Does
This is a trailer wiring harness extension designed for vehicles with trailer brake control wiring or those needing a trailer wiring harness extension. It covers 2014-2019 Chevrolet Silverado and GMC Sierra trucks across multiple cab configurations and engine options, plus select 2020 Cadillac Escalade, Escalade ESV, and Chevrolet Silverado 2500 HD models.
Why Genuine OEM Matters
This is a Genuine GM part, designed, engineered, and tested to rigorous standards and backed by General Motors. It's a new OEM component, so you get the fit the factory intended for your truck rather than guessing with a universal wiring kit. When the wiring ties into your trailer brake control, that matters.
Fitment
- 2014-2019 Chevrolet Silverado: 4.3L V6, 5.3L V8, 6.0L V8, 6.0L V8 FLEX, 6.2L V8, and 6.6L Diesel
- 2014-2019 GMC Sierra: 4.3L V6, 5.3L V8, 6.0L V8, 6.0L V8 FLEX, 6.2L V8, and 6.6L Diesel
- 2015-2020 Cadillac Escalade: 6.2L V8, 4-door SUV
- 2020 Cadillac Escalade and Escalade ESV: 6.2L V8 FLEX or GAS
- 2020 Chevrolet Silverado 2500 HD Custom Crew Cab and Extended Cab: 6.6L V8 GAS
Silverado and Sierra fitment covers Crew Cab, Double Cab, Extended Cab, and Regular Cab in Standard Box and Long Box variants. Always confirm your specific vehicle before ordering.
Get the Genuine Fix
Get your towing setup back on solid footing with the genuine GM replacement: 2014-2020 Chevy Silverado GMC Sierra Trailer Wiring Harness OEM