Where is the Brake Controller wiring harness connector on a 2005 GMC Envoy?

The brake controller wiring harness connector on a 2005 GMC Envoy is typically located under the dash, near the steering column. However, its exact location can vary slightly depending on trim level and specific options. You might find it tucked away behind the dash panel, sometimes near the fuse box or other wiring harnesses.

To find it, you'll likely need to:

1. Consult your Envoy's wiring diagram: This will give the most precise location. You can often find these online through repair manuals (like Haynes or Chilton) or sometimes from a GMC parts website.

2. Look for a multi-pin connector: The brake controller connector is usually a fairly substantial multi-pin connector, unlike smaller connectors for other things.

3. Look for loose or unconnected harnesses: If a brake controller hasn't been installed before, the connector may be dangling loose.

4. Carefully remove dash panels: This may be necessary to get a clear view of the area behind the dash. Be careful not to damage any existing wiring.

It's always best to consult a wiring diagram to avoid damaging your vehicle's electrical system while searching. If you're not comfortable working on your car's electrical system, it's best to take it to a professional installer for the brake controller.