2016 Chevrolet Silverado 2500 fuel system problems

Filed Mar 18, 2025 · Fuel system · 32,000 miles · CO

The contact owns a 2016 Chevrolet Silverado 2500. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The contact used a diagnostic scanner and retrieved DTC: P21DD. The vehicle was taken to the dealer, where the redundant tank reservoir and module kits were replaced; however, the failure persisted. The contact used a diagnostic scanner and retrieved DTC: P205B. The vehicle was taken to Abel Chevrolet (280 N Front St, Rio Vista, CA 94571), where the redundant tank assembly was replaced under GM Campaign Number: N192210260. The vehicle was repaired. The contact stated that he was concerned that the repair was a temporary fix. The manufacturer was notified of the failure, and a case was filed. The manufacturer referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 32,000.

Filed Mar 3, 2025 · Engine, Fuel system · GA

The motor started running bad and within seconds it stopped no other signs or problems

Filed Feb 20, 2024 · Fuel system · 174,000 miles · CA

The contact owns a 2016 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The driver was able to coast to the shoulder of the roadway, where the vehicle failed to restart. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed failures with the fuel injection pump and diesel particulate filter. The vehicle was repaired, but the failure reoccurred. The vehicle was taken back to the dealer, who diagnosed failures with the catalytic converter and fuel injector sensor. The vehicle was repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 174,000.

Filed Dec 7, 2023 · Engine, Fuel system · MA

The 6.6L V8 LML turbodiesel Duramax engine Bosch CP4 fuel pump failed. U.S. diesel fuel does not provide adequate lubrication for the CP4 fuel pump. The lack of lubrication led to internal fuel pump damage and resulted in metal shavings that damaged the pump, the fuel system, and the GM Duramax engine as well. There was no warning lamps, messages or other symptoms of the problem prior to the failure.

Filed Aug 15, 2023 · Fuel system · MI

On August 5, 2023 I was driving south on I75 in the Flint, Michigan area With no warning my engine shut down. High Pressure Fuel Pump (Diesel Truck) imploded and pumped metal shavings through the entire fuel system , Fuel Rails, and Injector system. Vehicle is currently being repaired. Repair consist of, Removal of the gas tank and completely clean. Flush and clean the entire fuel system, Remove injectors and replace with new. Replace old fuel Pump with new.

Filed Apr 7, 2023 · Fuel system · 70,000 miles · CA

The contact owns a 2016 Chevrolet Silverado 2500. The contact stated while driving approximately 65 MPH, the vehicle lost motive power, stalled, and stopped in the middle of the roadway. The contact stated that there were unknown warning lights illuminated. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the high-pressure fuel pump needed to be replaced. The vehicle had not been repaired due to a national backorder on the part. The manufacturer had been informed of the failure. The contact researched online and related the failure to the federal safety agency Campaign Number: 21E101000 (Fuel System, Diesel). The failure mileage was approximately 70,000.

Filed Feb 9, 2023 · Fuel system · MI

had to replace fuel pump at 60000 miles and had to have aftermarket replacement because dealership has been on back order for months. it was fine when i drove it last then 4 hours later won’t start.

Filed Oct 5, 2022 · Fuel system · CA

I was driving home from work on a busy road that had road construction and my truck without warning just died as if it ran out of fuel. I had it diagnosed and it’s the MP4 injection pump that went bad. Very common in this year it’s a minimum of$9500. To replace the entire fuel system. It could have caused me to have an accident. And GM is aware of the injection pumps going bad. The MP4 pumps are designed for vehicles in European countries not the USA. Ford and Dodge have class action lawsuits against them for this faulty system.

Filed Sep 13, 2022 · Fuel system · CA

I purchased 2016 Chevrolet 2500 HD from the dealership. The truck I bought had the CP4 high-pressure fuel injection pump, which comes standard in all GM-manufactured 2011-2016 6.6L Duramax diesel vehicles such as the Chevy Silverado and GMC Sierra, and it is incompatible with U.S. diesel fuel. The pump was originally designed for use in Europe, where the diesel fuel is "dirtier," or more lubricious, than that of the U.S. Because of the heightened pressure that the CP4 exerts in order to increase fuel efficiency, it causes the pump to disintegrate on itself, as the pump's internal metal parts rub against one another generating friction such that metal shavings wear off and are dispersed throughout the high-pressure fuel injection system. This process begins from the very first crank of the Duramax engine. Once these metal shards have sufficiently contaminated the high-pressure fuel injection system, the CP4 fuel pump will suddenly and catastrophically fail — oftentimes while the vehicle is in motion — and become unable to restart. I’m now looking at a $11,000 repair bill. GM knowingly sold a truck with defective parts.

Filed Jul 27, 2022 · Fuel system · 115,000 miles · IN

The contact's husband owns a 2016 Chevrolet Silverado 2500. The contact stated while her husband was driving 20 MPH and approaching a traffic light, the engine started to misfire. The contact's husband was unable to restart the vehicle after several attempts. The vehicle was towed to the hotel where he was staying. The vehicle was then towed to a local dealer where it was diagnosed that the CP4 high-pressure fuel pump had failed. The dealer also informed the contact that there were metal fragments inside the fuel lines and the fuel injectors. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 115,000.