Trailer wiring harness for Chevrolet Equinox/GMC Terrain 2018-2024

Trailer-light wiring for Equinox and Terrain

This harness is listed for 2018-2024 Chevrolet Equinox and GMC Terrain models. It brings the trailer-light connection to a 4-pin flat output, with a 6-pin female vehicle-side connector and two relays fitted to the harness.

The main wire bundle is covered by black corrugated loom. A separate lead ends at the flat trailer connector, leaving it accessible when connecting the trailer.

Connections and components

Listed Chevrolet application

Equinox, 2018-2024

Listed GMC application

Terrain, 2018-2024

Trailer connection

4-pin flat

Vehicle-side connection

6-pin female connector

Listed overall length

24 inches

Relay configuration shown

Two relays attached to the harness

Relay markings

12VDC coil; 40A at 14VDC contact marking

Wire covering

Black corrugated loom over the main bundle

Mounting items pictured

Two metal clips, two screws and six cable ties

The 40A marking is on the relays. It does not establish a 40A rating for the trailer connector or the complete harness; trailer-circuit current limits are not specified.

Confirm the vehicle's wiring configuration

Before ordering, check the mating connector's shape, locking tab and terminal layout against the product photos. Confirm that your vehicle has the required trailer-wiring circuits for this harness. Tow-package and trim requirements are not specified, so the model and year alone do not confirm the connection.

After installation, test the trailer's running lights, brake lights and both turn signals before towing. Pin assignments and any vehicle-specific fuse or programming requirements are unconfirmed for this kit.