2019 Chevrolet Silverado 2500 FUEL/PROPULSION SYSTEM

The fuel tank vent got plugged, which collapsed the fuel tank, damaged the fuel pump causing the truck to stall at highway speeds on the highway in traffic. GM certified mechanic at the dealership confirmed and mentioned that he had already repaired 4 trucks with this issue in Rochester, MN. Prior to the failure, the fuel gauge was inaccurate and a few days later the check engine came in at which time we scheduled an appointment with the mechanic.

The DEF system does not provide a level indication. Whenever the DEF is filled it always results in a DEF spill to the environment since the operator does not know whether to add 5 gallons or one gallon.

The DEF fill port is not vented and provides a tight fit with the DEF dispensing hose and nozzle at a truck filling station. The DEF dispensing nozzle cannot be placed entirely in the port since it pressurizes the DEF tank and causes block back spray on the operator. Filling the DEF tank at a truck filling station always results in DEF spillage regardless of the filling technique employed.

Lack of proper venting of the DEF holding tank causes tank to buckle and expand resulting in very loud metal banging sounds as vehicle travels between high and low elevations. For example driving from Flagstaff AZ (el. 7000) to Phoenix AZ (el 1600) results in loud metal noises from the tank as it partially implodes due to change in pressure. Should the DEF tank develop cracks the result is a leak in DEF to the environment.

WHEN VEHICLE IS ACCELERATING ANYWHERE FROM 30-50 MPH, THE TRUCK LOSES POWER FOR SEVERAL SECONDS, AND STARTS SPUTTERING OR CHUGGING. THE RPM ON THE DASH STARTS BOUNCING UP AND DOWN. THIS GOES ON FOR SEVERAL SECONDS AND TRUCK SLOWS DOWN. IT THEN GOES AWAY AND CAN CONTINUE DRIVING. HOWEVER, WHEN TOWING TRAILERS, THE EFFECT IS ONLY INCREASED AND THE TRUCK SLOWS DOWN EVEN MORE.