I have a 2001 Bravada. The passenger side head light doesn't work at night. It works with the daytime running lights during the day. There are two lights on each side, and the high beams work all of the time. I've had the car for a while and previously the drivers side power window motor would stop for a day or two, and then work fine. Lately the gas gauge has been doing "weird" things, (turn the car off with a quarter tank, start the car and on empty, warning light on?) My guess is body control module, but it's a very expensive to just start replacing electrical parts.