Question about 2004 GMC Envoy

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Tach holds 6000 rpm's at idle and will raise higher during accel.

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  • Bkotzian Nov 19, 2008

    Start car and RPM is at about 5000 goes beyond 7000 into know where land engine run fine,

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You have a bad tach, the only way to fix is to replace the instrument cluster.

Posted on Nov 26, 2008

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