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Open the hood. There is a black molded plastic piece which runs the width of the hood from one side of the truck and over the radiator, to the other side. This is the same piece of plastic which you snap in the rod which holds up the hood. Over each headlight there is an access hole in the plastic. look down inside that opening and you will see a small white adjustment screw. turn it to adjust the headlight to your preference. The adjustment screw may have dust or dirt on it but once you find the holes over the lights you will have no trouble locating what you need.

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Q: How do you adjust the headlight located on a 2003 Chevy Trailblazer?
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