DTC is for Low Fuel Level Sensor Input... I've removed the carpet in the trunk to reveal full access to the fuel sending unit (Its right there and very accesible). The dealership quoted a fix at $1300.00, but that seems a little stiff since everything seems to be so accesible. I have some experience removing and replacing complete engines in Chevy vehicles.... I was thinking about replacing the whole fuel sending unit but don't want to get in over my head.. What do you suggest?