Truck lights dim while truck is running
My truck lights dim while it is running and brightens when you give it gas, i think it could possibly be my alternator cause my battery guage also moves up and down
Cars & Trucks - GMC - Yukon - 2003 GMC Yukon
Answers & Comments
It could be. But first check to make sure the small wire coming from your ground cable to your fender is secure. If this cable is not attatched or loose, the headlights will flicker.