Projects & Repairs --> Lights --> Headlights --> 2006 GMC Envoy

Replacing headlight bulbs on a 2006 GMC Envoy or Chevy Trailblazer.

Replacing Headlight Bulbs On A 2006 GMC Envoy

(Covers Model Years 2002 to 2008)

In This Article:

Slide plates are lifted up, the headlight assembly is moved forward and the turn signal bulb and marker bulbs are removed. The headlight bulbs are removed and replaced.

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Skill Level: 2-3 (Basic to Intermediate)

Time Taken: About 15 Minutes

By Jim Wilk, Licensed Auto Body Technician


This 2006 GMC Envoy has slide plates that need to be pulled up to allow the headlight assembly to come out of it's mounting panel.

Sometimes these slide plates need penetrating oil so they can slide easily, due to road dirt and salt.

Slide plates that secure headlight assembly in GMC Envoy.


Lifting slide plate with flat screwdriver.

I used a long flat screwdriver for leverage and gently pried up on the end tab of the slide plate.

These slide plates only need to slide up inch to 1 inch to release.


View of inboard slide plate in the up position. Inboard slide plate on headlight assembly, 2006 GMC Envoy.


Removing front turn signal bulb on a 2006 GMC Envoy. I then used the long flat screwdriver to push the release tab in and free it up on turn signal bulb socket and turned the socket clockwise.

The yellow circle shows the outboard slide plate in the up position.

The turn signal bulb is a number #3357 clear.

Then I released the wire connector on the back of the headlight assembly by pulling up on the tab and pulling out the electrical connector (green arrow). Disconnecting electrical connector for headlight assembly.


Removing marker light bulbs on GMC Envoy. To remove the marker light socket (green circle), I turned the socket and released it.

At this point the headlight assembly was completely disconnected from the car.

The side marker bulb is number a #94 clear.

View of back of headlight assembly, the green arrows show the headlight bulbs. They can be released by turning the bulb and then disconnecting the wire connector.

Before removing the bulbs, the plastic caps need to be pulled off.

Removing head light bulbs on GMC Envoy or Chevy Trailblazer.



When handling headlight bulbs, grab the bulb with a tissue or a piece of plastic. The oil on your skin can cause the bulb to overheat and burn out prematurely.


Headlight bulb numbers: Low beam #9006, high beam #9005


Front end of GMC Envoy with hedlight assembly removed. View of headlight mounting panel with slide plates in up position.


More Info:

Tools Used:

  • Basic Mechanic's Tools
  • Long Flat Screwdriver

Materials Used:

  • Low beam #9006
  • High beam #9005
  • Marker Light #94 Clear
  • Turn Signal #3357 Clear

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Written August 27, 2009