Projects & Repairs --> Lights --> Headlights --> 2008 Chevy Trailblazer

Replace hedlight bulbs on Chevy Trailblazer.

Replacing Head Lights On A
2008 Chevy Trailblazer

(Covers Model Years 2002 to 2009)

In This Article:

The front grille is removed and the headlight assembly is removed so the bulbs can be replaced.

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Skill Level: 2-3 (Basic to Intermediate)

Time Taken: About 1 Hour

By Jim Wilk, Licensed Auto Body Technician


Replacing the headlight bulbs on this 2008 Chevy Trailblazer was quite a job.

To replace the high and low beam headlamp bulbs, the grille has to be removed so the head light assembly can be removed.

2008 Chevy Trail blazer.


Front grill snap clip locations, Chevy Trailblazer.

The red arrows show all the snap clips that need to be released on the back of the grille.


In this photo the red arrows show the location of all the snap clip retainers that were released. Mounting clip locations for front grille on Chevy Trailblazer.


Applying masking tape around lights to protect plastic grille. To protect the lens from getting scratched or cracked, I put two layers of masking tape on the bottom of the head light lens and the top of the turn signal lens.


Using a small screwdriver, I gently pried out the edge of grille ends, releasing the two snap clips. Prying on plastic grill with small screwdriver.


Snap clips on back of grille, Chevy Trailblazer. View of snap clips mounted on back of grille ends.


View of snap clip retainers of the headlight assembly. Mounting clips on body of car.


Prying off front grille on Chevy Trailblazer. I slid a big screwdriver between the grille snap clip and the retainer. Then I twisted the screwdriver until the snap clip released.

I did this along the top of the grille first, then I leaned the grille out and released the rest of the clips.

Then the grille was completely removed.


On the top of the headlight, on the inboard side, I slid the retainer clip up. Lifting headlight retainer.


Outboard retainer location for headlight, Chevy Trailblazer. I found the outboard retainer underneath the fender and slid it up.


Then I pressed the release tab and pulled the electrical connector out of the side marker lamp (red arrow).

Before I could remove the headlight assembly, there was another electrical connector down below, and also a bulb to remove.

Electrical connector for headlight, Chevy Trailblazer.


Headlight assembly, Chevy Trailblazer. I removed the entire headlight assembly and placed it face down on a towel.

The red arrow points to the side marker lamp bulb socket. This bulb can be removed by twisting it.


This is the marker lamp socket and number 94 clear bulb after being removed.

Caution: The metal prongs in the socket can bend easily, resulting in problems re-connecting the wires.

Marker light and bulb.


Electrical connector and turn signal locations. At the bottom of the lamp assembly  I rotated the turn signal socket counter-clockwise (green arrow) and removed it from the housing.

Then I lifted up on the tab of the wire connector (red arrow) and pulled it out.

The turn signal bulb is #3157 Amber.


View of turn signal and wire connector. Front of Chevy trail blazer with headlight removed.


Rubber cover caps over headlight bulbs. To expose the headlight bulbs I pulled off the two rubber caps.


View of high and low beam bulbs. Headlight assembly, rear view.


Head light bulb, Chevy Trailblazer. The high beam takes bulb number 9005.


To remove the bulb I turned it counter-clockwise and pulled it out. Head light bulb.


Removing wiring connector, Chevy Trailblazer headlight. To remove the wire harness I lifted up on the tab and pushed the wire connector off.

I replaced the low beam bulb with a number 9006 replacement bulb.


View of grille and headlamp panel. This was a lot of work for just a couple of light bulbs.

After changing the bulbs, I had to put this all back together.

Chevy Trailblazer with grille and headlights removed.


More Info:

Tools Used:

  • Basic Mechanic's Tools
  • Small Flat Screwdriver
  • Large Flat Screwdriver

Materials Used:

  • Low Beam Headlight #9006
  • High Beam Headlight #9005
  • Turn Signal Bulb #3157 Amber
  • Marker Light Bulb #94 Clear

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Written October 29, 2009