Driving home yesterday my temperature gauge on the 2003 chevy silverado went all the way to the right as if it was overheating. No overheat light came on. I pulled over and checked everything and nothing was hot and it had water. So it wasn't actually overheating but the temperature gauge was all the way to the right as if it was overheating. After getting home I let the truck sit awhile and restarted it and the gauge didn't reset. What causes this and how can I fix it? Thanks for your time!
