Sounds like a bad stepper motor in the cluster. GM has a bunch of bad ones floating around out there. If you are handy with a soldering iron you can buy a kit with all the stepper motors to repair that dash off eBay. It is not a hard repair as long as you follow the directions.
Or send it to a place that repairs them like drspeedometer. Com or bobsspeedometer. Com or gmgaugerepair. Com or any of the others you can find.
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Monday, September 11th, 2017 AT 10:45 PM