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For some reason the driver side headlight low beam and brake light only both do not work and bulbs are good checked fuses and a new brake light just fun but not sure if there is something I am missing
 

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2006 chevy trailblazer_lt
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This is an odd one to solve. But, at least try this, swap relays #45 and #46 in the under hood fuse block. If your driver's side low beam comes back, then the relay that was in #46 and now is in #45 needs to be replaced. As far as the driver's side brake light, you might have to replace the whole bulb assembly.

Good luck!
 
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