2015 Chevrolet Silverado 2500 fuel system problems

Filed Jan 10, 2026 · Engine, Fuel system · IL

My pickup truck has a Duramax diesel engine with a CP4 diesel injection pump. That pump has not failed yet in my truck. However it has been known to fail in numerous other GM vehicles with Duramax engines and when it does fail the engine comes to a complete stop and cannot be restarted. This is a potentially hazardous even fatal situation. Repair if the pump fails is very expensive - $12,000 to $14,000 in some cases. I would like GM to replace the injection pump at my dealership to ensure this known failure does not occur. My pickup truck is otherwise in excellent condition.

Filed Jun 3, 2025 · Fuel system · 190,000 miles · MS

The contact owns a 2015 Chevrolet Silverado 2500. The contact stated while driving approximately 65 MPH, the vehicle stalled. The contact stated there was no warning illuminated. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the high-pressure diesel fuel pump had failed, and the entire fuel system needed to be replaced. The vehicle was repaired. The manufacturer was informed of the failure and referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 190,000.

Filed Jan 2, 2025 · Fuel system · WV

on [XXX] my 2015 Chevy 2500 crew cab LTZ Duramax with 50,959 miles stopped running going down a large hill, Barely made it off the road coasting into a Fire department parking lot. 2nd failure occurred while driving on a main route in WV. At 66,600 miles [XXX], was almost rear ended because truck again just stopped running going 50 mph around a turn. Diesel fuel was pouring onto the hot engine second occurrence. I don't know how the truck didn't catch on fire. Thank [XXX] I wasn't towing my 14,500 lb fifth wheel either time. Both incidents were because of a CP4 injection Pump Failure completely taking out and polluting the entire fuel system. Per GM service department in Wintersville, Oh. I no longer feel safe driving the truck and wouldn't even consider towing with it again. Too dangerous for me and my family !! I am fearful this could end up causing serious injury or death !! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 14, 2024 · Fuel system · IN

CP4 fuel pump caused the vehicle to shut down and stopped running.

Filed Jul 19, 2024 · Fuel system · TN

Vehicle stopped without warning due to the CP4 Pump failure in the diesel truck. This pump has been recalled by other manufacturers but not by GM / Chevrolet which is the maker of my vehicle.

Filed Nov 17, 2023 · Fuel system · VA

I was driving north on Va. 10 in Hopewell when my engine unexpectedly, with no warning, quit. I was in heavy traffic with no power brakes or steering and had to maneuver to the right lane and find an area that was off the road that I could get into. Fortunatley there was a parking lot that I managed to coast into. The truck would not re-fire so I called for a wrecker

Filed Sep 13, 2023 · Fuel system · CA

Per a report from Car Complaints, the lawsuit alleges that 2011- through 2016-model-year Chevy Silverado and GMC Sierra pickups equipped with the 6.6L V8 LML turbodiesel Duramax engine are equipped with defective Bosch CP4 fuel pumps that are more fragile and prone to wear than previous CP3 fuel pumps. According to plaintiffs, the defective CP4 pumps can be destroyed by U.S. diesel fuel, which is allegedly “drier” than diesel fuel in other countries. The lawsuit alleges that U.S. diesel fuel does not provide adequate lubrication for the CP4 fuel pump. The lack of lubrication can lead to internal fuel pump damage and result in metal shavings that damage the pump, the fuel system, and the GM Duramax engine as well. This damage can lead to the truck stalling and losing power, and may require the vehicle to be towed to a shop, leaving customers with big repair bills. The lawsuit goes on to allege that GM was aware that the Duramax engines and related fuel pumps were defective prior to selling affected vehicles, but declined to notify customers. Rather, GM allegedly concealed that the defective CP4 pumps may be destroyed by U.S. diesel fuel.

Filed Aug 13, 2023 · Engine, Fuel system · MI

The fuel injection pump malfunctioned causing the truck to shut down going down the highway. It was taken to a professional and was confirmed to be an issue with these vehicles. There was no warnings at all. The cost to repair was $8000.00

Filed Mar 26, 2023 · Fuel system · UT

CP4 failure, caused metal fragments to go throughout fuel system and tank. Entire fuel system had to be replaced and tank cleaned out. CP4 failed in the middle of my drive home, stalling the truck in the middle of an intersection. Luckily had enough momentum to roll and pull over to the side of the road.

Filed Mar 6, 2023 · Engine, Fuel system · MS

Fuel pump failure while driving highway speed 70mph pulling a trailer. Engine light came on and engine went to limp mode for a few seconds then completely shut down without warning while still going at least 60. Lost power steering and power brakes. Service center confirmed the code for "low fuel rail pressure" and did the repair. I have retained the CP4 pump for analysis. I was very lucky to not crash my truck.