Curt 55311 Custom Wiring Harness for GMC K15/K25/K35 1973-1978

Curt custom wiring provides everything you need to connect your vehicle's electrical system to a trailer. With plug-and-play connectors, a custom wiring harness easily integrates with your vehicle taillights to provide a standard trailer wiring connector, typically in the form of a 4-way flat. This custom wiring harness features a vehicle-specific design to perfectly fit certain years of the gmc k15/k25/k35 (to verify vehicle compatibility, see the Curt application guide). It uses OEM-compatible connectors to "T" into the vehicle's taillight assembly and provides a standard 4-way flat output to power the taillights, brake lights and turn signals on your trailer.

Features

• Plugs into existing OEM vehicle socket to provide a 4-way flat socket
• Simple plug-and-play design eliminates the need for cutting or splicing
• 4-way flat output connects tail lights, brake lights and turn signals
• Dust cover included to keep connector clean when not in use
• Backed by a limited one-year warranty

Specifications

• Electrical System Type: 2 Wire
• T-Connector Location: S1, S2
• Output Type: 4-Way Flat
• Installation Difficulty: Easy

Vehicle Fitment 

Technical Files 

Installation Instructions

Videos