I have a 2004 Chevrolet Trailblazer with approx. 38,000 miles and the low beam headlights just quit working. The high beams work. I have already checked the low beam fuse and they are ok. I swaped the high beam relay with the same relay as the windsheild washer and it too is ok. The day time running lamps do not work either. I even tried to turn the headlights on by the switch and the result is the same. They work on high beam and will not work on low beam. Any replys are appreciated. Thanks for any help. I may take it to the dealer tommorrow.