Question about 2004 GMC Envoy

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Gmc envoy 2004

My speedometer is broken...does not even work. all other gages are fine
also when I start up the vehicle it makes a loud noise and runs hard then afer a few minutes of driving it quiets down. Sometimes the 4wh drive light comes on and randomly the rear end will experience a a knock or something

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  • rtwillis Nov 06, 2008

    I have also had a problem with intermittent failure of the speedometer. It would slowly back off to zero while in motion and then not register at all. Now the speedometer seems to be working the majority of the time but the tach has stopped completely.


  • Anonymous Nov 24, 2008

    My 2004 Envoy XL's tachometer stop working a year ago and the mileage on my vehicle was just in the 30's and about 6 months later my spedometer went out also. I took it to the shop and they wanted $500 plus to fix it. I waited and it started to work again, but has stopped working at least two more times since. How can I get the company to pay for the repair?

  • Anonymous Dec 12, 2008

    2004 envoy with the same problem. Tach hasnt worked since we bought it 6 months ago and all of a sudden the speedometer just quit.

    I had the same problem with my 04 silverado with the tach but i got it fixed under warranty. some kind of module went out. But hers isnt under warranty anymore so i need to know how to fix it.

  • AdamL33 Jan 11, 2009

    Wow, I have the same thing with my speedometer. I have less than 40k miles and now speedometer will work 1 out of every 4 times I start it.

  • lsuarez01 Feb 12, 2009

    We bought our 2004 Envoy Nov. 2007 used. The speedometer worked for about 5 mos. and stopped working. We thought it was from an accident we had but our insurance agent said this was a recurring problem from a lot of Envoys. You'd think if there are so many of us with the same problem they'd do a recall? Ours just stays pegged at 120mph. It never moves. A GMC dealership wanted at least $600 to fix it. (the price could go up depending on the amount of time spent on it)

  • Anonymous Mar 12, 2014

    Temp and mph gages randomly are inaccurate. While stopped and even while the car is off, it says I'm going 5mph or up and the car is over heating. Makes knowing my speed impossible because it also changes while I'm driving



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Sound like poss. speed sensor problem.

Posted on Nov 11, 2008


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I repair Envoy instrument clusters for a very reasonable amount and have a free 12 Year Guarantee on my work, you can see my site at

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