Question about 2004 GMC Sierra

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Speedometer not working

Show its running 30 mph faster than it is

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  • 207 Answers

Origional size tires wheels ??

Posted on Dec 11, 2014


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Posted on Jan 02, 2017

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SOURCE: I have a false speedometer

I would star by checking the wires and connections for these gages. If they are good then replace the gages.

Posted on Jul 30, 2008

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SOURCE: speedometer

The speedo is electronic and has failed, you will need to have it repaired by an authorized GM repair shop that does GM electronics, this is not the dealer, they will send it out and charge 2X, send it out for repair yourself, bypass the dealer.

Posted on Oct 27, 2008

  • 30 Answers

SOURCE: speedometer is working but reading way off

It appears that you need to have the speedometer calibrated. Unfortunately, this is very challenging. You'll need to take it to a mechanic. Dependent on where you take your Envoy it can cost around $75+

Posted on Jan 10, 2012

Testimonial: "thank you that sounds about hwat i was worried about thank you so much for the reply it was verty helpful "

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SOURCE: speedometer malfunction

The instrument cluster in this model is controlled by a processor, this computer translates signal from the main on board computer to the cluster and this is translated into information that can be displayed by the gauges and the speedo head, the needle is moved by a tiny electric motor called a stepper motor, this motor is likely the cause of the problem you have. You will need to remove the cluster from the dash and send it in for repair to a GM electronics repair station. All of the tiny motors should be be replaced as they are all prone to develop this problem.

Posted on Feb 29, 2012

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