Professional Installation
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Trailer Hitches
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GMC Acadia (2024–Present) Flat-4 Wiring Installation
Vehicle Coverage: 2024–Present GMC Acadia with the compatible rear vehicle harness
Output: Exterior 4-way flat trailer-light connector
Connector Location: Mounted outside near the receiver
Connection: Uses the protected factory rear connector and required fuse positions
Best Timing: Install while the rear bumper is already open for the hitch
Connector Location: The completed flat-4 is mounted outside near the receiver and protected with a dust cover.
1. Verifying Vehicle Power and Fuse Provisioning
The battery is isolated and the required under-hood fuse positions are checked before the rear connector is used. Missing required fuses are installed only in the specified locations.
2. Accessing the Factory Rear Connector
The driver-side rear harness is reached from below or while the bumper is already removed for the hitch. The weather cap is released without damaging its locking mechanism.
3. Connecting and Routing the Trailer Harness
The exact-fit connector is fully seated and locked, then routed along the hitch toward the center of the vehicle. The lead is supported away from exhaust heat, sharp edges, moving suspension, and fascia attachment points.
4. Mounting the Exterior Flat-4
The connector is secured near the receiver where it can be reached easily but will not hang below the hitch or contact the exhaust.
5. Testing Before Final Reassembly
Running lights, brake lights, both turn signals, and ground integrity are tested before the bumper and lower trim are closed. The dust cover is installed after the connector passes its function check.
Exterior Convenience. The trailer connector remains at the hitch, with no loose wire routed through the Acadia’s hatch opening.