CURT Quick Plug Trailer Brake Controller Wiring Harness — Fits Select Chevy/GMC/Cadillac, 24in 12‑Gauge

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

If you need a fast, tidy way to install or replace a trailer brake controller in compatible Silverado, Sierra, Tahoe, Yukon, Suburban and Escalade models, this harness gives a direct OEM-style connection. It uses 12-gauge wiring, comes with a protective slit-loom sleeve and includes zip ties for neat routing. The harness is about two feet long to allow flexible mounting of your brake controller while keeping the wiring secure and protected from abrasion.

How does this harness simplify brake controller installation?

Installation is plug-and-play: one end inserts into the vehicle's factory brake controller socket and the other plugs into the CURT controller, eliminating the need to splice or modify factory wiring. That saves time and preserves vehicle wiring integrity.

• Vehicle-specific connector matches OEM brake controller port
• No cutting, splicing, or soldering required
• Comes with zip ties for clean routing and insulation
• Approximately 24-inch length for flexible controller placement

Will this work with my CURT brake controller and trailer?

The 51452 harness is compatible with most CURT controllers that use the Quick Plug interface, including proportional, inertia and time-delay units. It transmits power and signal reliably to electric trailer brakes when matched to a compatible vehicle application.

• Works with CURT brake controllers equipped with quick-plug connectors
• 12-gauge wires for consistent power delivery
• Designed for use with trailers that have electric drum brakes
• Suitable as a replacement or for new controller installations

Which vehicles does the CURT 51452 fit?

This harness is built for select model years of Chevrolet Silverado and Suburban, GMC Sierra and Yukon, and Cadillac Escalade/Escalade ESV. Always verify the application list for your exact year and trim to confirm fitment before buying.

• Designed for specific Silverado, Sierra, Tahoe, Suburban, Yukon and Escalade models
• Vehicle-specific design prevents mismatched connectors
• Check your OEM brake controller socket to confirm compatibility
• Sold as a single harness intended for quick replacement or retrofit

How is the harness protected and organized under the dash?

The wiring bundle is wrapped in a slit-loom sleeve that resists abrasion and helps prevent crushing when routed through tight spaces. Zip ties are included to secure the harness out of sight and reduce movement that can wear connections over time.

• Slit-loom sleeve protects wires from rubbing and impact
• 12-gauge conductors maintain reliable current flow to the controller
• Included zip ties for secure, concealed mounting under the dash
• Compact 24-inch length balances reach with neat installation

Who is this for: The CURT 51452 Quick Plug harness is ideal for owners of compatible Chevrolet, GMC and Cadillac trucks or SUVs who want a fast, factory-like connection for a CURT trailer brake controller—whether installing a new controller or replacing an existing harness. It’s geared toward DIY mechanics, fleet technicians and anyone who prefers preserving OEM wiring while adding or maintaining electric trailer brake control.