Is it possible to replace the bulb without removing the whole air box assembly? I can get the rubber cover off; could probably get the bulb out, but I'm a little concerned about getting the new one back in.
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Both sides have a rubber cover behind the actually headlight. There are 2 rubber covers, one on the top for the high beams and one on the bottom for the low beams. Drivers side is easy, reach your hand down there and remove. The passenger side requires removal of the air cleaner top to have easy access. Hope this helps!
Behind the low beam and high beam lamps, on the back of the assembly,
you can see and feel a round, cup-like, hard plastic piece. This is
really just a rubber cap covering a plastic cylindrical housing, and is
the "back-door" for lamp access. This rubber cap, or lid, can be pulled
off with your fingers...if you can grip it just right and pull off. If
this is too hard to do, then take a flat tip screwdriver and gently
"pry" it off. Then twist the bulbs counter clockwise about a quarter turn.
If you are going to replace the passenger side low beam remove
the air cleaner assembly first. To do this remove the cross brace, then
the 3 screws on the air cleaner assembly. This will give you easy
access to the bulb assembly. Test the bulb before you reassemble.
Remove the carpet covering the inside near the headlight. Remove round rubber plug. (pull hard, the plug has NO WIRES coming out of it) Use the 5mm wrench that is in the toolkit. (toolkit is behind the spare tire). Turn the wrench 180 degrees and the whole headlight assembly will loosen. Pull out the whole assembly. Remove plastic end cap. The high beam, low beam and parking bulbs are all right inside that cover. Just did my 2002 for the first time. This is also covered in the manual if you have one. Thanks, firstname.lastname@example.org
My niece has a jimmy, they should be the same. The inside should be the high beam, the outside the low, DO NOT TOUCH THE GLASS ON NEW BULBS! Oil will cook on them and pop them! Both come off the same way. Take off the big rubber thing. They are soft but over hard plastic. Just pull them off. If you have trouble, you can flip the little wire clips that hold the headlight housing in place, this will give you room to see the rubber caps enough to figure them out better. The bulb assembly rotates CCW counter clockwise, and should slip out easily. Take the wires and plug off. it should be obvious how it pulls off. Snap the new bulb into the wires without touching the glass part. Gently replace in backwards order as you removed it. Put the rubber caps on, they keep water off the bulbs. It will break them!
The passenger side was harder for me. I had to take the air cleaner off, the whole cover and filter.You should be able to see or feel the same type caps, The low beam outside, High beam inside. The same 2 wire clips are there to release the housing. Everything pretty much goes the same, other than the air cleaner has to be removed and replaced. And make sure the rubber cap is replaced! Good Luck and good motoring!
All you have to do is find the "round rubber
cover" on the back of the headlamp, pry it out with a flathead
screwdriver and the lamp is right there.
To remove the headlamp assembly on a Trailblazer, remove the plastic
panel that covers the hood latch assembly. Take the cover for the air filter in order to
get to the low beam cover. Take the 3 screws out of the air filter
cover and remove. You will then be able to get to the back of the low
beam lamp. The high beam is reachable without this hassle.
Other suggestion: 1. open hood, locate the rubber covering the light bulb assembly. 2. Turn it counterclockwise.. fidget with it to get it right. 3. pop it out.. and replace... clean with a paper towel to keep the oil from your skin off of it. 4. Start car, turn on light. 5. Reassemble. Hope this helps.