Headlights Won't Work
The headlights in my GMC Sierrra 2500 stopped working for some reason. I just had the alternator replaced, and when I got in to drive it that night, the headlights wouldn't turn on. However, the dash lights, marker lights, brake lights, reverse lights, and turn signals all still work. It seems weird that all four bulbs would go out at once, so I haven't tried new bulbs yet. Anything it may be if not the bulbs? And if it is the bulbs, what may have caused all four to go out at the same time?