i have an 03 silverado.... and my headlights just stopped coming on..... the parking lights are on and the tail lights come on..... ive checked the fuses..... the high beams are coming on..... but not the low beams.. the bulbs are still good.... im assuming its some sort of wiring problem?

 

are you sure the bulbs are good????? capsule bulbs can be hard to tell if they are bad sometimes pull one out and apply 12v to it to confirm they are good and this will also tell you if you have a wiring problem or not

 

Check the wiring at the headlamps. You may used new bulb to check it.

 

sounds like either the headlight switch or dimmer switch