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2004 Chevrolet Trailblazer Question: Loud engine rumbling noise - changes in drive/park and when a/c off better.

 

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SparkyM, Citrus Heights, CA, September 24, 2012, 12:29
 Rookie

It gets louder when I accelerate from stops. I've seen answers to similar questions - poss water pump or fan clutch. How easy are these to replace myself? Thanks!

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