Two others owners found they were and have sued GM. CarCompliants.com reports that it has received complaints about the issue from other owners as well. The two owners that sued laid out a pretty interesting case. They say the GMC 9012 halogen single filament bulb design is not bright enough for safety. Prior to that new design the truck used a total of three bulbs; A H11LL bulb for the low beams, a 9005LL bulb for the high beams and a 5202 bulb for the fog lights To see all the details, check out the story at CarComplaints here.