How to Replace High Mount Third Brake Light 02-06 GMC Envoy XL
Difficulty: Beginner · About 2 min · Gmc Envoy
Replace the high-mounted third brake light on a 2002–2006 GMC Envoy XL by guiding its wiring through the liftgate and testing the lamp before closing the glass.
Tools you will need
- Flat Blade Screwdriver
- Phillips Head Screwdriver
Parts and supplies
- Compatible high-mounted brake light assembly
Steps
Disconnect and remove the lamp
Open the liftgate and release the wiring grommet. Unplug the lamp connector, open the liftgate glass, and remove the lamp screws while supporting the housing.
Free the lamp harness
Guide the wiring through its slot and release it from the old lamp. Inspect the connector and grommet for damaged seals or corrosion.
Install the replacement lamp
Connect the harness to the new lamp and route the wire through the opening without pinching it. Position the housing and install its screws evenly.
Reconnect and test
Reconnect the vehicle harness and press the grommet fully into the liftgate. Test the brake light with assistance before closing the glass and hatch.
Check your vehicle’s repair manual for exact specifications and fit.