I just bought a 2005 Trailblazer LS 4x4 and love it but the high beam headlamps don't work. All the fuses seem to be good and tried replacing the bulbs and nothing. Any ideas??

 

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It sounds like a fuse issue, but I cannot be positive. Since you stated the fuses are good and the bulbs have been replaced, it may be a wiring issue. I would suggest visiting your local dealer for an inspection. They should be able to pinpoint the problem with more accuracy. Best of luck and keep us up to date!

Louis
GM Customer Service