Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
When the fuel gauge is erratic or incorrect, this is most commonly due to a faulty Fuel Level Sensor. This sensor is located inside the fuel tank, mounted to the side of the fuel pump assembly. These are actually fairly common fail items on many GM vehicles. Inspect the electrical connector and wire harness going to the top of the fuel tank for any loose, broken or damaged wires. If the visual inspection checks ok, replace the fuel level sensor. If you found this answer helpful, please help me and leave a rating using the "stars" at the top of the page or click 'accept'.Rating or accepting my answer does not cost you extra. It allows me to be credited for this Q&A.