Six problems related to headlights have been reported for the 2000 GMC Sierra. The most recently reported issues are listed below.
While driving at approximately 65 mph the headlights failed. Owner contacted the manufacturer, who stated that the vehicle was out of warranty, and there was nothing else they could do. The auto lighting system goes out. The consumer stated that he tried to turn on the manual switch does not work.
The running lights continued to short out. The bulbs have been replaced eight times in the past year. This did not affect normal use of the headlights or the tail lights. The vehicle has not been to the dealer for this issue. Contacted manufacturer, who said they would not pay for the repairs. The contact believed the lens on the day time running lights were filling up with water when it rained. The contact drilled holes in the bottom of the lens to allow water to escape. Since the contact had performed the drilling the lights have not shorted out as often.
Headlights flicker on and off rapidly. Dealer thinks alternator is at fault.
Headlights flash sporadically while driving in the dark.
Headlights sporadically flash off and on when driving in the dark.
Noise in rear suspension while accelerating and stopping. Vibration in steering wheel during a right bend in road. Also headlights dim and go back while driving.