Check to see if the foglight switch is on. Brights (high-beams) are automatically disengaged when fog lights are being used.
have you replaced the dimmer switch? if not that may be the problem. I had the same problem in reverse( brights worked but headlights didn't) water damaged the dimmer switch on the steering column once I replaced it all was good.
sounds like the headlight control mudule
Sounds like you have a faulty stalk/multifunction switch.
could be headlight fuse or headlight switch.
There is no 2000...Trac's start at 2001.
Yes, if you have dual beam lamps.
I work at Chevy dealership and we put 5 quarts of motor oil on 3.8L engine... In fact i have 2002 Grand Prix GT.
Defective heater resistor pack.
No
You didn't mention a problem.
loose or broken wire. bad connections att the fuse or relay. bad switch. bestt i ccan think of right now. hope it helps. duboff
The dim lights on a 1994 Grand Prix could go out when the headlamp switch is on if there is a short in the wiring for the headlights. There could also be a problem with the bulbs themselves if they were touched during installation. The oils in the fingers can short out new headlights.