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Hi all, I have an 06 Trailblazer and my biggest concern is my license plate light - I have replaced it several times but still doesn't work. Also, the rear wiper and rear defogger don't work - any help and suggestions to at least fix the license plate light would be greatly appreciated. Thank you.
 

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“ the rear wiper and rear defogger don't work” I had the same issues for years, there Is a rubber tubing at the top of the lift gate that connects the gate to the frame. The wires in there go to the Liftgate control module and the wear down over time and break when opening and closing the gate. Just check there first to see if there’s broken wires
 

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2008 chevy trailblazer_lt
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Does your key fob still lock and unlock the doors? If not, you've likely got a control module issue. The liftgate control module controls all functions you mentioned plus the key fob issue, too. The one in my '08 went bad last year.

As said above the wiring to the LCM may also have gone bad.
 
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