This 2004 GMC Envoy came in with the passenger side low beam not working. This repair applies generally to Envoys, Bravadas and Trailblazers, with only slight differences in the headlight assembly removal. Some require removing the grill assembly. This one is pretty simple though. Pull the retainers straight up. You can use just you fingers. If you decide to use a screw driver for leverage, be careful not to break anything.
Pull the second retainer up.
With the retaining bars released the headlight assembly can be gently wiggled out to expose the wiring. The light sockets twist and rotate out. The larger socket has a lever lock that has to be depressed before removal.
There is another harness connector at the lower inside edge that has to be removed.
With the assembly out of the vehicle , I removed the rubber cup covering the light bulb and wiring. Looks a little toasty.
Rotate the bulb counter clockwise and remove.
This is the replacement harness connector that I like to use. It is a high quality German connector that has been modified to fit this application. To order this low beam repair harness please click here. If you need a high beam repair harness please click here.
A couple of quick splices.
Splices done with heat shrink tubing in place.
Connect the harness to the bulb. Do not touch the glass on the bulb. The bulb will blow after installation if any oils from you hand attaches to the glass. The oil causes uneven heating of the glass and it will shatter and let the inert gas out and then the element will burn out.
Using the harness connector as a handle insert the bulb back into the headlight assembly and twist into place. Install the rubber cover and install in the vehicle. It’s that simple.