2005 4wd 1500 sierra crew cab. had a new front u-joint put in. when i drove the truck home the speedometer registered about 10 mph low. hte next morning the sp[eedometer never left zero.
Transmission speed sensor , wheel speed sensor
Most new GMC vehicles use an electronic speed sensor. Check underneath the vehicle for rubbing wire harness against the drive shaft, or possibly a loose / disconnected electrical cable to the transmission.
You might need a new speedo cable but if its a sensor you could need a new sensor and that might not be cheap.
429 views
Usually answered in minutes!
×