Vehicle is a Duramax Diesel engine with a CP4 fuel pump. The pump went out and the entire line/system has to be replaced. While driving the vehicle it lurched, made a noise then went to reduced power mode and shut off. Luckily we had just pulled off from a stop sign, if that happened and the speed of 55 it could of been far worse. Then engine would not restart and had to have vehicle towed.

- Tarboro, NC, USA

While Pulling 35' 5th Wheel down freeway, a message appeared in instrument panel telling me the fuel filter was at 0 percent and was going into low power mode. There happend to be an offramp there that I was able to get off the freeway. While making the turn on the offramp the truck died. I pulled over as far as i could whie coasting with no power steering or brakes, leaving truck & trailer partially blocking the offramp. Unable to start the vehicle, I Immediatly contacted Onstar and they dispatched the CHP & tow truck. When CHP arrived he asked when tow truck would be there. Without being able to confirm exactly, and due to safety concerns because of blocking the offramp, he called his own tow truck (Rons Towing) and forced me to move vehicle to safe location. The issue ended up being the injector fuel pump (CP4) that GM was well aware of going out and sending metal fragments throughout the fuel system. I've been told the pump was made in China and not to GM standards. The vehicle has been repaired, all work was covered under extended warrenty, This all could have been avoided if GM would have replaced the faulty fuel pump under recall. Had this happened 100 miles further on our trip we would have been going over Pacheco Pass in Calif. Could have been a total disaster had we been going down the other side with No Power Steering & No Power Brakes pulling a 12,000 lb Trailer in the Dark.

- Clovis, CA, USA

2016 GMC denali 2500 6.6L duramax diesel. Consumer writes in regard to faulty crankshaft that caused irreparable damage to engine.

- Mobile, AL, USA

The contact owns a 2016 GMC Sierra 2500. On several occasions, the vehicle stalled without warning at any rate of speed. Mastria Buick GMC (1525 new state hwy, raynham, MA 02767, (508) 880-7000) was notified of the failure several times. The vehicle was taken to the dealer numerous times, but they could not duplicate or diagnose the cause of the failure. The manufacturer was notified and stated that the matter would be escalated. The contact had not yet received a response from the manufacturer. The failure mileage was not available.

- East Freetown, MA, USA

The contact owns a 2016 GMC Sierra 2500. While driving approximately 15 mph, the engine stalled without warning. The vehicle was towed to a dealer where it was diagnosed that the fuel injector pump failed and needed to be replaced. The vehicle was repaired. The manufacturer was informed of the failure. The VIN was unknown. The approximate failure mileage was 11,000.

- Fountain Hills, AZ, USA

The contact owns a 2016 GMC Sierra 2500. The contact stated that there was an oil leak after seeing a puddle of oil under the vehicle. The failure occurred without warning. The dealer diagnosed that the turbo was defective and needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle remained at the dealer where it was diagnosed that the oil cooler was defective. The oil cooler was replaced, but the failure recurred. The manufacturer was notified of the failure. The failure mileage was approximately 4,400.

- Lynchburg, VA, USA

While driving at 45mph in the left lane of a major city thoroughfare the engine quit running, power steering and brakes did not work. The check engine light came on when the engine quit running. I was able to get the vehicle stopped but the engine would not start. The vehicle was towed to the dealership where I was told this issue was reported in Arkansas, Louisiana and Tennessee. The dealership reported that shards of metal were found in the fuel injector and the entire fuel system would have to be completely replaced. Additionally I was told the parts are hard to get. The vehicle was purchased new and was 7 months old and had just over 7,000 miles. The vehicle is still sitting at the dealership 10 days later and has not been moved from where it was delivered by the wrecker service. GM has been notified but no response from GM or dealership management yet as to what caused the engine failure. I occasionally tow a fifth-wheel rv with this vehicle. I no longer feel safe driving the vehicle and would not consider purchasing another until a determination is made on exactly what went wrong.

- Little Rock, AR, USA