Having problems with your 2003 GMC Envoy ?
My 2003 GMC Envoy tachometer is reading 5-7000 rpm at idle and sweeps off the scale when driving.
I see this a lot on the 03-06 Envoy instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It can be fixed though, check out this page about how to get it fixed - Envoy tachometer not working
Repair Help & Product Troubleshooting for 2003 GMC Envoy
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