2003 trailblzer head light bulb replacement

On a 2003 Chevy Trailblazer, you have to remove the grill to access the back of the head lights. It takes a good pull (don't be afraid to use a little force). Pop the hood and there 4 metal pieces that slide up and several plastic pieces that pop up. You will see the lips on the metal slides (about an inch in width) and you pull those up to loosen the grill. There are 2 of these slides (one on each far side, almost hidden) that are hard to get your hand into that you might need a screwdriver or something for leverage to slide them up. Then pop up the plastic pieces holding the headlamps in place and with a little force pull the grill off.
Then you can access the back side of the headlamps to replace the bulbs.

Usually on a chevy you need to pop the hood. take a look at the back of the head light lens you should see a socket with 2 wires on it. you will need to turn the socket one way or another. it will twist and come out. just remember when replacing the bulb do not touch the glass on the new bulb. always hold it by the plastic base. the oil on our hands will burn the bulb immidiatley.