Question about 2006 Chevrolet Colorado

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2006 Colorado My 2006 Colorado sounds muffled like a (roar) between 40-50MPR

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  • tr03612000 Feb 06, 2009

    No power loss,
    I just came back from Firestone and they took it for a test drive, they told its normal, I'm not convinced.

    The best way to describe this, it sounds like when a manual shift vehicle is in 3rd gear when it really should be in second gear if you know what I mean. This only happens when the truck reaches 45-to 50 PMH, when I apply the gas it downshifts OK.

  • madisontech May 11, 2010

    do you still have good power?or is there a power loss?



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Sounds like you have a partially blocked catalytic converter,but this generally comes with a power loss,you may have it checked.

Posted on Feb 08, 2009

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Check your fan clutch on water pump.(may be staying engaged) Also have cat converter checked for partial obstruction (may not be bad enough to give a performance problem yet) Both can give symptoms you posted.

Posted on Feb 06, 2009


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