Question about Chevrolet TrailBlazer EXT

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Rpm goes up down - TrailBlazer EXT Chevrolet Cars & Trucks

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This is a pretty common issue for Trailblazers to have. Here's a link with more information about these GM gauge problems. And where you can purchase replacement parts on Amazon if you want to do the repair yourself.
Trailblazer Speedometer

Posted on Dec 16, 2014

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My rpm are going up and down while driving.


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