Chevrolet C/K1500 Fuel Gauge Diagnosis That Works!

If your fuel gauge is either sitting past full and not moving or moving rapidly and “humming” this will help you diagnose the problem. If the stepper motor in the dash works when the purple wire is grounded the fuel gauge reads close to empty depending on resistance of jumper wire. If the stepper motor goes to “E” when grounded the problem is most likely the sensor on the fuel sending unit, if the stepper motor doesn’t change when grounded the stepper motor is most likely bad. You can find the stepper motor on eBay for around $44 and a sending unit varies in price by manufacturer and what all you get. Any questions or comments I will try to answer as soon as possible, Thank you!