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Discussion Starter · #1 ·
My Trailblazer makes a loud thump or knock noise once in awhile. it sounds like it is coming from the center console. It kind of shakes the car pretty good too. It has happened about 6 times since October. Usually while accelerating or stopping. What could it be?
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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Could it be hard upshifts and downshifts related to the 9spd?
 
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