By junkgmcsierra on
2008 GMC Sierra 1500 Work Truck 2dr Regular Cab 8 ft. LB (4.3L 6cyl 4A)
GMC will not stand behind there Trucks. My 2013 Sierra has ahard banging type clunk noise when shifting to 3rd gear sometime it feels like the powertrain is going to break. After several attemts to have it resolved including a test drive from a GM rep i have been told this is normal condition. GM bulletin # 01-07-30-042G. This truck has less than 9k miles on it.