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'03 Trailblazer

Old 07-15-2007, 02:34 PM
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Default '03 Trailblazer

Anybody got any ideas or experience on how to change the headlight bulb on one of these? The whole back of the assembly is sealed. Thx.
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Old 07-16-2007, 07:33 AM
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Default Re: '03 Trailblazer

go to www.trailvoy.com

They have a lot of info on those trucks.
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Old 07-16-2007, 07:47 AM
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Default Re: '03 Trailblazer

If there doesn't look like there is access from the front, then I'd say you have to pull the grill assembly to gain access. I've never seen a system where you change out a lamp from the back.
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Old 07-16-2007, 12:10 PM
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Default Re: '03 Trailblazer

i have two trail blazers, i'll take a look at mine and let you know.
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Old 07-16-2007, 12:17 PM
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Default Re: '03 Trailblazer

Have an '04 Trailblazer and '04 Impala. Haven't had to change a headlamp on the blazer yet but have on the Impala (which is changed out from the rear of the assembly). Not sure if the Blazer is configured the same way but try this:

Open the hood and look down towards the lamp needing replacement. You may see two plastic (they're white in the Impala) retainer clips that will slide up inlocking the assembly. They may be hidden and/or somewhat awkward to get to but they come out rather easily (not so much going back in if they're in an obstructed location). Once the clips are disengaged, the entire lamp assembly will slide out from the grill and you'll be able to disconnect the lamp wiring and unscrew the bulb housing.

Now, if your comment above about the back being sealed is after you have the assembly out, then I can't be of much help.

Good luck.

Alex
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Old 07-16-2007, 01:39 PM
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Default Re: '03 Trailblazer

I have one and had to change the passenger side head lamp. Ended up havcing to remove the air filter cover assembly, which was only three screws I belive, to gain access to the rear of the head lamp compartment. From there it was a typical removal and replacement. It was definitely the most difficult access I have ever had to change a bulb though.

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Old 07-16-2007, 02:05 PM
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Default Re: '03 Trailblazer

AlexD - 7/16/2007 12:17 PM


Open the hood and look down towards the lamp needing replacement. You may see two plastic (they're white in the Impala) retainer clips that will slide up inlocking the assembly. They may be hidden and/or somewhat awkward to get to but they come out rather easily (not so much going back in if they're in an obstructed location). Once the clips are disengaged, the entire lamp assembly will slide out from the grill and you'll be able to disconnect the lamp wiring and unscrew the bulb housing.

Follow his instructions.





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Old 07-17-2007, 12:16 AM
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Default Re: '03 Trailblazer

Ok folks, I did it this morning. Basicly the grill just pops off, it's held on by these little expansion clips. Then as mentioned above there are these two u-channel clips holding the light assembly in. Once removed it gives you access to the rubber boot on the back of the assembly that has to be removed in order to gain access to the bulb. It's realy simple once in the know, but I'll bet the dealerships are chargeing at least an hr labor and maybe an hr diag to pull this 10min job off. It's realy an unbelievable way to change a bulb. Thx for all your help.
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