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Buick Enclave (2018–2024) Trailer Wiring Installation

Vehicle Coverage: 2018–2024 Buick Enclave; exact trim and factory tow-package equipment are verified before scheduling
Output: Passive 4-way flat trailer-light connector
Finished Connector Location: Mounted outside the vehicle at the hitch with a dust cover, ready to connect without routing the lead through the liftgate.
Testing: Running lights, brake lights, both turn signals, and ground are verified before delivery
Connector Location: Mounted outside the vehicle at the hitch with a dust cover, ready to connect without routing the lead through the liftgate.
The Enclave uses an exact-fit connection above the driver-side muffler. The exhaust is lowered for access, the harness plugs into the factory rear-light connector, and the flat-4 is secured outside at the hitch.
1. Lowering the Rear Exhaust for Access
The driver-side rear exhaust section is supported and lowered enough to reach the protected factory connector above it.
2. Connecting the Vehicle-Specific Harness
The factory connector is separated and the matching trailer harness is locked between the original connections without cutting the vehicle wiring.
3. Routing the Flat-4 to the Receiver
The output lead is carried toward the center of the vehicle, protected from the muffler, heat shields, suspension, and sharp edges.
4. Securing the Exterior Connector
The flat-4 is mounted at the hitch with a dust cover so it remains accessible without closing the lead in the liftgate.
5. Testing Every Lighting Circuit
Running lights, brake lights, left turn, right turn, and ground are verified before the exhaust and any removed supports are restored.
Why We Use Verifiable Wiring: We install passive powered or exact-fit trailer-light circuits that can be completely function-tested before the appointment is finished. We do not install active modules that require programming or prevent full verification before the vehicle leaves.