1998 gmc 1500 speedometer not working and not going past 2 gear

Asked by Jan 24, 2017 at 02:57 AM about the 1998 GMC Sierra 1500 C1500 SL Extended Cab LB

Question type: Maintenance & Repair

When the speedometer works so does the gears

1 Answer

105,375

This really sounds like a vehicle speed sensor problem or the wiring from it is is intermittent in the connection. The computer uses the speed sensor as well as other sensors to determine the shift points of the tranny. A live data scanner will be able to show you if the sensor is operational or not.

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