Engine light came on after two weeks of buying this truck for 25k. The chevy shop said it was something in the oil pan and charged me $450. A week later the light was back on, something else in the oil pan this time the warranty covered it. When the dealership took it for a test drive after having it for 6 weeks 4 weeks total they blew the piston in one of the cylinders. They replaced the engine with a factory built block, and I've had nothing but service engine lights since. Now I uses three quarts of oil between each oil change.