How to Adjust the Headlights on a Chevy Trailblazerby Alibaster Smith
If the headlights on your Chevy Trailblazer are out of alignment, you will find it difficult (or impossible, depending on how badly out of alignment they are) to see at night or when it is overcast. However, there are adjustment screws on your Trailblazer that you can use to fix the alignment.
Open your hood and locate the vertical and horizontal adjustment screws. The vertical adjustment screw is located on the top of the headlight assembly. The horizontal adjustment screw is located on the side of the headlight assembly towards the center of the hood.
Orient the Trailblazer so that it is facing a flat wall and is positioned 10 to 15 feet away from it.
Mark the vertical and horizontal center lines of the headlights on the wall. Locate the center of your headlights. Put a strip of masking tape horizontally on the wall that corresponds to the center of the Chevy's headlight. Repeat this process for the vertical center line.
Turn the headlights on and adjust the horizontal and vertical adjustment screws. The headlight should be approximately two inches below the horizontal center line and two inches to the right of the vertical center line.