CURT Trailer Brake Controller Wiring Harness 51452 — 2 ft Quick-Plug, 12‑Gauge for Chevy/GMC/Cadillac

The CURT 51452 Quick Plug wiring harness is a vehicle-specific, plug-and-play adapter that lets you connect a CURT trailer brake controller to select Chevrolet, GMC and Cadillac trucks and SUVs without cutting or splicing.

This two-foot CURT Quick Plug adapter is designed to simplify trailer brake controller installation: one end mates with the factory brake controller socket in compatible vehicles and the other end plugs directly into a CURT brake controller. Built with 12-gauge wires, a protective slit-loom sleeve and included zip ties, the harness provides a tidy, durable link between your vehicle and trailer’s electric braking system.

How does this harness make installation easier?

Installation is plug-and-play, eliminating the need to locate, cut or splice factory wiring. The harness is tailored for specific vehicle wiring layouts so connections line up correctly the first time.

• Direct-fit vehicle connector matches OEM brake controller socket.
• No cutting, soldering, or tapping required for proper hookup.
• Two-foot length offers flexible positioning for controller mounting.
• Included zip ties keep wiring neat and secured under dash.

Will this wiring harness work with my CURT brake controller?

This Quick Plug harness is compatible with most CURT brake controllers that use the Quick Plug connector, including proportional, inertia and time-delay models. Confirm vehicle fitment to ensure the harness matches your truck or SUV’s factory socket.

• Compatible with CURT controllers using the Quick Plug connection.
• Works for replacement or new brake controller installations.
• Supports electric trailer brakes of varying trailer types and weights.
• Check application notes for supported model years and trims.

What materials and protections does the harness include?

The CURT 51452 harness is built with heavy-gauge wiring and abrasion-resistant sleeving to maintain a reliable electrical path under the dash and through tight spaces. The design helps prevent wire damage and keeps the installation looking professional.

• 12-gauge wires for consistent power delivery to the controller and trailer brakes.
• Slit-loom sleeve shields wires from crushing and abrasion.
• Secure connectors sized for OEM sockets to avoid loose connections.
• Zip ties provided to bundle and route wiring neatly.

Which vehicles does this harness fit?

The harness is vehicle-specific and fits select years and models of Cadillac Escalade (including ESV), Chevrolet Silverado, Suburban, Tahoe, and GMC Sierra, Yukon and Yukon XL. Always verify your vehicle’s model year and factory brake controller socket before ordering.

• Designed for specific Chevy, GMC and Cadillac trucks and SUVs—see application list.
• Includes common full-size pickups and large SUVs used for towing.
• Ideal for models with the factory brake controller socket already present.
• Serves as a direct replacement for worn or missing harnesses.

Who is this for: The CURT 51452 Quick Plug wiring harness is for owners of compatible Chevrolet, GMC and Cadillac trucks and SUVs who want a fast, reliable way to install or replace a CURT trailer brake controller without modifying factory wiring. It’s also suited to DIYers, fleet technicians and towing enthusiasts seeking a neat, durable, OEM-style connection between vehicle and trailer braking systems.