2014 Sierra 1500. 213K miles. Had ac just before 100K, Vacuum pump replaced before recall, got $ back. Had new transmission around 175K (ouch). Tires and brakes as needed. replaced plugs, wires and ignition coils around 200k after one coil caused some misfires. wondering what new engine might cost @300K. still feels like a new truck. Might put new belts on it next year. Oh yeah, a new battery a couple years ago. So not zero problems.