Temp sender switch may be bad or wire off
Temperature gauge in my 1994 gmc sierra not working. What's causing this?
The best way to figure this out would be to go to a certified automotive mechanic. It could be the sending unit (i.e. Sensor) it could be the wiring, it could be the motor in the cluster (dash). Any number of things could be malfunctioning
There is a sensor in the side of the block that may be the problem.It is between no 1 and no 2 plug.