Some times the speedometer sticks, usually after driving for a while. Often after setting overnight it dropps back to zero but not always.?
There is a recall on 2004 Chev Trucks with sticking gauges- go to your dealer
On an 04 anything you dont have a speedo cable it is ran electronicly by tthe computer.Since you arent geting a check engine light when this happens you will have to take your truck to the dealer and have the computer downloaded with the current updates.I just fixed an 04 envoy that had the same problem
Try changing the spedometer cable if you havent already
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Oops, Yes, I can spell speedometer (sometimes)
I think the problem in in the cluster itself. When you turn off the truck the speedometer gets stuck at the most recent speed usually over 40. When you start to travel again, it adds the your current speed to the speed that the speedometer stopped at. So if it stopped at 40 and you were on a 70 mph freeway it would show 110 mph.
No, the check engine light does not come on and the rest fo the guages seem to be working fine.
do you get a check engine light on the dash when this is happening?
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