2015 GMC Sierra 2500: fuel pump failure

Filed Jul 10, 2025 · Fuel system · 129,000 miles · CA

The contact owns a 2015 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the vehicle lost automotive power and stalled. No warning lights was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the Fuel Pump Module needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 129,000.

Filed Jul 12, 2023 · Engine, Fuel system · IN

While driving down the highway at 60 mph, the truck stumbled then completely died. After coasting to a stop truck would not restart. Towed to a repair shop to find out the Bosch CP 4 fuel pump exploded and contaminated the whole fuel system with metal shavings. A very expensive and lengthy repair. GM has known there is issues with these parts, but has failed to recall and fails to cover repair costs. Other manufacturers using the same part have issued recalls. While I was able to safely the get vehicle to the side of the road, the failure could’ve resulted in an accident causing personal injury or property damage.

Filed Dec 14, 2022 · Fuel system · 136,000 miles · CA

The contact owns a 2015 GMC Sierra 2500. The contact stated while her husband was driving approximately 20 MPH, the vehicle lost motive power and stalled. The vehicle lost power steering and power braking functionality. The contact stated that her husband did not see any warning lights being illuminated. The contact stated that her husband pulled over and stopped the vehicle. The vehicle could not be restarted. The contact stated that her husband purchased a fuel head for the diesel engine. The fuel head was replaced, the vehicle was started, and ran for less than a minute when the contact heard loosened nuts and bolts coming from the engine compartment. The vehicle stalled and was towed to an independent mechanic. The vehicle was diagnosed, and it was determined that the CP4 had to be replaced with a CP3 Conversion (Part 10904), fuel pump module assembly (Part N10021) and a Duramax Conversion kit (Part 10904). The vehicle had not been repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 136,000.

Filed Feb 10, 2021 · Fuel system · 118,273 miles · CA

2015 gmc sierra 2500 duramax driving east with the flow of traffic on 80 reaching the summit towards tahoe. We suddenly experience at "change fuel filter" warning which only lasted approximately 20 seconds before the message then read "derating". Upon this second notification we immediately lost power to the engine which resulted in reduced braking capability and steering at literally the top of the mountain. We were traveling in snowy conditions with many semi trucks around us. We tried to safely drift to the shoulder to the safest possible place. The sudden lack of power left my family, including 3 children, in a very dangerous position. We ended up being stranded with tow trucks being very scarce and challenging to find. The nearest rental car took 2 hours to get to, and we had to shuffle kids all over. One child was crying and scared to death at all the cars zooming by and our inability to move. It appears that the cp4 fuel pump may have failed leaving us almost instantaneously in an unsafe situation.

Filed Aug 27, 2019 · Fuel system · 102,040 miles · MT

The cp4 fuel pump imploded and sent metal shards through my vehicles entire fuel system