Should be a Halogen bulb High-low beam combo maybe, maybe not. As you are looking down at the back of the headlight assembly gently push down on the clip that holds the wiring harness to the bulb. Now rotate the bulb counter clock wise (left) and then remove it. Reverse process to install.
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To get to the bulb you need to take bolt out of the cross brace going to the fender. Loosen up the bolt on the other end so you can move brace out of the way . Take the top of the air filter box out which has 3 screws holding it on. Now you have room to get your hand in. You have to take rubber boot off back of light houseing to get to bulb. Might as well change out air filter while you are at it.
try this website --->www.trailvoy.com<--- they have alot of stuff to help you with your trailblazer i should know im a member my self i have a 2003 Chevy trailblazer Lt www.trailvoy.com
Come to our enthusiasts forum and find out www.trailvoy.com
It pulls off. Sometimes easier to remove the headlight assembly to change the bulb. We have instructions at our forum. www.trailvoy.com Trailblazer enthusiasts!
for detailed instructions visit www.trailvoy.com
need help changing the belts on my Chevy trailblazer lt 2003
How do you change the spark plugs on a 2002 chavy trailblazer
Here you go. Step By Step Directions provided by www.Trailvoy.com http://forums.trailvoy.com/articles.php?do=viewarticle&artid=8
the air box by the right headlight has three quarter turn screws remove, lift up ,and replace. easy
There are several things that can cause your 2004 Chevy Trailblazer headlights to keep going out. The most common cause is a loose or corroded ground wire.
how do you change a lightbulb in a chevy cobalt?
remove and replace engine coolant temperature(ect)/chevy 2004 trailblazer
Call someone