This works for a 2003 Blazer, they may be the same.
You will actually have to remove the head light assembly to access the bulbs. The procedure will not throw off the headlight aiming a bit and it is real easy.
If you look at the top of the radiator support just above where the head lights are, you sill see two black plastic pieces that lean in toward the engine compartment on each side. They are about an inch, or so, wide. Just pull/lever them up and the head lamp will pop out for access to the bulbs.
You will need to pop out the center grill and then on each headlight unit there are two tabs (one on each side of unit) that you need to pull up. After that carefully pull out the headlight unit and remove the wires that are for the lights. To change the bulb remove the large rubber cap and twist the bulb holder to remove the bulb from headlight unit.
How do i replace the headlight switch on a 03 trailblazer in detail. Such as what needs to be removed befor the switch is installed and with what tools .
Where is the starter on a 2004 Chevy trailblazer.
We have a how to with pictures at our enthusiasts website! www.trailvoy.com
how do you replace side marker light on 2008 chevy trailblazer
How do you replace a throttle body on a trailblazer 2002
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for detailed instructions visit www.trailvoy.com
replace the starter
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
the air box by the right headlight has three quarter turn screws remove, lift up ,and replace. easy
remove and replace engine coolant temperature(ect)/chevy 2004 trailblazer
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!