CURT Trailer Brake Controller Wiring Harness, Fits Select Chevrolet/GMC/Cadillac Trucks & SUVs — Plug-and-Play 24in 12‑Gauge

CURT 51452 is a vehicle-specific, plug-and-play wiring harness that connects your trailer brake controller to select Chevrolet, GMC and Cadillac trucks and SUVs without cutting or splicing.

This Quick Plug adapter eliminates complicated wiring when adding or replacing a brake controller. Designed to mate directly with the OEM brake controller socket on compatible Silverado, Sierra, Tahoe, Suburban, Yukon and Escalade models, the harness provides a neat, reliable connection using 12-gauge conductors, a protective slit-loom sleeve and included zip ties for tidy routing. At about two feet long, it offers flexible mounting options while keeping the installation reversible and factory-compatible.

How simple is installation with this CURT Quick Plug harness?

Installation is designed to be straightforward for owners comfortable accessing the vehicle’s driver-side panel area. One end plugs into the factory brake controller socket; the other plugs into a CURT brake controller—no wire cutting, splicing, or soldering required. The included zip ties and slit-loom sleeve help secure the harness and protect the wires from abrasion.

• Plug-and-play mating with OEM brake controller connector
• 24-inch overall length for flexible mounting
• Slit-loom sleeve keeps wires bundled and protected
• Zip ties included for clean routing and fastening

Which vehicles does this wiring harness fit?

This harness is vehicle-specific and fits select model years of Chevrolet Silverado, GMC Sierra, Chevy Suburban and Tahoe, Yukon and Yukon XL, plus Cadillac Escalade and Escalade ESV. Always verify fitment against the application information for your exact year and trim before purchasing. Using the correct vehicle-specific plug prevents mismatches and preserves factory wiring integrity.

• Compatible with select Chevrolet, GMC and Cadillac trucks and SUVs
• Designed to match the OEM brake controller socket for specified years
• Useful as replacement or for a new brake controller installation
• Check vehicle application list to confirm fit

Will this harness work with my CURT brake controller model?

Curt Quick Plug harnesses are compatible with most CURT brake controllers that use the quick-plug connector, including proportional, inertia and time-delay controllers. The harness simply transfers power, ground, brake signal and illumination (where applicable) between the vehicle and controller. It’s a universal CURT solution within supported controller lines—confirm connector compatibility on your controller first.

• Works with most CURT brake controllers using the quick-plug connection
• Supports proportional, inertia and time-delay controller types
• Maintains factory wiring configuration without modification
• 12-gauge wires ensure dependable current flow to the controller

What durability and safety features does this harness include?

The harness is built with 12-gauge wire to provide stable current between vehicle and controller and to handle braking loads consistently. A slit-loom sleeve protects against abrasion and crushing, while the included zip ties help keep the installation secure and out of sight. Because the harness plugs into the OEM socket, it preserves the vehicle’s factory wiring and makes future removal or replacement easier.

• 12-gauge conductors for consistent electrical performance
• Slit-loom sleeve resists wear from vibration and routing contact
• Zip ties included to secure and conceal the wiring harness
• Non-destructive installation maintains factory wiring integrity

Who is this for? If you own a compatible Chevrolet, GMC or Cadillac truck or SUV and want a fast, non-invasive way to install or replace a trailer brake controller, the CURT 51452 Quick Plug harness is a practical choice. It’s aimed at vehicle owners, fleet technicians and DIY tow-enthusiasts who prefer a clean, reversible installation that preserves the OEM wiring and supports most CURT controller models.