CURT 55510 Vehicle-Side 4-Pin Trailer Wiring Harness for Chevrolet Colorado, GMC Canyon & Isuzu I-Series

CURT 55510 Vehicle-Side 4-Pin Trailer Wiring Harness — Plug‑and‑play reliability for select GM trucks

When towing becomes part of your routine, the CURT 55510 Vehicle-Side Custom 4-Pin Trailer Wiring Harness provides a dependable electrical link between your vehicle and a trailer. Designed for select Chevrolet Colorado, GMC Canyon, and Isuzu I-Series models, this harness delivers a standard 4-flat trailer connector without invasive wiring changes. The goal is a clean, durable connection that travels with your vehicle from city streets to backroads.

Rather than cutting into factory wiring, the harness uses OEM-compatible connectors that plug into the taillight assembly. This plug-and-play approach offers a secure, long-lasting connection and minimizes installation time. The kit includes all necessary wiring components and a dust cover to keep the connector clean when not in use.

Key benefits at a glance

• Plug-and-play design eliminates cutting or splicing
• 4-way flat output powers tail lights, brake lights, and turn signals
• Tail light converter ensures vehicle-trailer compatibility
• SMT circuitry boosts performance and durability
• Dust cover protects the connector when not in use
• Vehicle-specific fit; verify compatibility via the application info

How it works and what’s included

The harness plugs into the taillight assembly and provides a standard 4-pin socket for your trailer. It includes all necessary wiring components and a dust cover to protect the connection when parked or stored. To confirm compatibility, refer to the vehicle application information.

• Plug into the taillight assembly for a 4-pin output
• All wiring components are included for a complete install
• Dust cover helps keep connectors clean when not in use
• Application info verifies vehicle compatibility before install

Real-world use cases

• Towing a small boat or utility trailer on weekend trips with a straightforward, non-invasive hookup
• Hauling gear to job sites or camps without dealing with complex splicing or modification
• Seasonal trailer setups that benefit from a ready-to-use, plug-and-play connector

Why choose CURT

CURT employs modern SMT circuitry and vehicle-specific connectors to deliver a reliable electrical path for towing needs. The design emphasizes ease of installation, durability, and compatibility, all without altering your vehicle’s factory wiring. Always verify the fit using the provided application information for your Chevrolet Colorado, GMC Canyon, or Isuzu I-Series.