Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
These two symptoms are directly related. It sounds like you are going to have a faulty Engine Coolant Temp (ECT) Sensor. This sensor is what controls both the fan operation and the dash gauge. Replacing the ECT should solve both problems.
Do I need to drain out the water before I take out the sensor
need help on a 1999 Chevy K3500 pickup with a 7.4 L