My speedometer works fine on my 2004 Silverado but every time i turn the heater on, the mph tends to go up but not back down to 0 mph when i stop. After i turn it on and off a few times it eventually goes back down, this only happens with the mph gauge the rest work fine. Does anyone else have this issue? & is there anything i could do before i take it to a shop?
Its a 2004 Silverado 1500 5.3L v8 4x4 with 63,000 miles.
Appreciate the help!
sound likes an electrical problem