Just under the hood, pop it open, by the battery, there is this black box, snap it open by pessing the flaps on the sides, then there are a couple of screws, try open that cover up, and if not unscrew the screws, and just underneath the cover there is a diagram, the #46 relay is the HDM (headlamp module) try swapping it with #45 the coolant relay (just temporarily) if the hadlamps work back on, it means the #46 relay is blown, replace it, will cost around 30 to 40 bucks on your favorite auto parts store.
relay in the hood fuse box HDM relay (Headlamp Driver Module)
Electrically Adjustable Pedals
Where is the starter on a 2004 Chevy trailblazer.
If your Chevy trailblazer 2004 gauges are not working, check your fuel pump.
The 2004 Chevy Trailblazer holds 7 quarts of oil.
where is map sensor on 2004 trailblazer
I need a diagram for the vacuum lines on a 2004 Chevy trailblazer
remove and replace engine coolant temperature(ect)/chevy 2004 trailblazer
105mph
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
Seeing as your not that savvy.. take it to a 'lube shop let them change your oil
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