2016 Chevrolet Silverado 2500 Fuel system Problems

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 NHTSA Hotline for assistance. The failure mileage was approximately 32,000.

NHTSA ID

11649076

Incident

May 2, 2022

Mileage

32,000 mi

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

NHTSA ID

11645994

Incident

Feb 28, 2025

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.

NHTSA ID

11572946

Incident

Jul 15, 2023

Mileage

174,000 mi

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.

NHTSA ID

11558992

Incident

Dec 1, 2023

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.

NHTSA ID

11538757

Incident

Aug 5, 2023

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 NHTSA Campaign Number: 21E101000 (Fuel System, Diesel). The failure mileage was approximately 70,000.

NHTSA ID

11516042

Incident

Mar 25, 2023

Mileage

70,000 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.

NHTSA ID

11506442

Incident

Nov 19, 2022

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.

NHTSA ID

11488112

Incident

Sep 22, 2022

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.

NHTSA ID

11484352

Incident

Sep 9, 2022

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.

NHTSA ID

11476175

Incident

Jul 22, 2022

Mileage

115,000 mi

MY TRUCK HAS A MAJOR EXHAUST LEAK THAT FLOWS INTO THE CAB OF MY TRUCK. IT HAS A DURAMAX DIESEL ENGINE. I NOTICED AFTER I FIRST BOUGHT THE TRUCK, SO I THOUGHT IT WAS NORMAL AND TOLD MY FAMILY MEMBERS IT WAS NORMAL. 6 MONTHS AFTER THE PURCHASE, I NOTICED THAT MY SENSE OF SMELL AND TASTE WAS LACKING. MY DOCTORS HAD NO EXPLANATION ON WHY I HAVE LOST MY ABILITY TO SMELL. I DROVE 3 TIMES IN 2 YEARS TO SEATTLE,WA AND EVERY TIME I ARRIVED I WAS INCAPACITATED. I HAS A SORE THROAT, COUGH, AND DIARRHEA FOR A WEEK. AFTER RETURNING HOME ON THESE TRIPS, THE SAME SICKNESS HAD TAKEN OVER MY BODY. THE DEALERSHIP REPLACED AN EGR PART AND CLAIMED THE PART WAS LEAKING AND MY PROBLEM WAS SOLVED ON 9/6/2018. I MADE ONE TRIP OF SIX HUNDRED MILES 1 WEEK AFTER THE REPAIR AND WAS SO SICK AFTERWARDS, I STARTED LOOKING FOR ANSWERS MYSELF I BOUGHT A CARBON MONOXIDE DETECTOR AND IT STARTS BEEPING AT 100 PPM WITHIN 2 MINUTES AFTER STARTING MY TRUCK, AND THE DETECTOR STARTS BEEPING WITH MY WINDOW DOWN. RIGHT NOW I AM WAITING FOR A CALL FROM MY DEALER TO REPAIR THE PROBLEM, MY TRUCK HAS 58,000 MILES, AND I AM AFRAID TO DRIVE IT ANYWHERE BECAUSE MY NOSE IS STILL BURNING FROM DRIVING 2 MILES ROUND TRIP TO A LOCAL POST OFFICE ON 9/17/2018. I BELIEVE I AM LUCKY TO BE ALIVE AND THE LEAK IS PROGRESSING IMMENSELY. I HAVE ALL THE CO2 AND NOX POISON SYMPTOMS. THERE IS A NOXIOUS SMELL, SINCE CO2 IS ODORLESS, THE SMELL IS NO2 OR NOX. THE PROBLEM IS WITH THE DOWNPIPE OFF THE TURBO AND THE FLANGES HOLDING THE PARTS TOGETHER. I WANT SOMEONE TO KNOW ABOUT THIS PROBLEM BEFORE SOMEONE DIES AND IT GOES UNNOTICED, IF IT HAS NOT HAPPENED ALREADY. THE PROBLEM IS WITH THE DOWNPIPE OFF THE TURBO AND THE FLANGES HOLDING THE PARTS TOGETHER ARE DEFECTIVE. SINCE THE PARTS ARE MADE IN CHINA, I WAS WONDERING HOW THEY COULD BE DEFECTIVE. I DON'T BELIEVE A COMMUNIST COUNTRY WOULD WANT TO HARM AN AMERICAN UNNOTICEABLY.

NHTSA ID

11139788

Incident

Mar 17, 2016

Mileage

700 mi

I AM ON A CROSS COUNTRY TRIP AND THE VEHICLES ENGINE LIGHT CAME ON, I PULLED INTO A CHEVY DEALER FOR SERVICE. CHEVY DEALER CLAIMS THE PART NEEDED FOR REPAIR CALLED AN ECM MODULE, (I.E. COMPUTER) IS NOT AVAILABLE AND IT IS NOT BEING PRODUCED BECAUSE OF A DEFECT IN DESIGN. THE VEHICLE HAS BEEN WITH A CHEVY DEALER FOR 10 DAYS. I AM 1100 MILES FROM HOME AND GENERAL MOTORS HAS REFUSED TO GIVE ME A LOANER TO DRIVE BACK TO KANSAS CITY. IN TALKING WITH THE DIESEL TECHNICIANS AT TWO OF THE DEALERS, THEY CLAIM THIS IS A WIDESPREAD PROBLEM THAT GM IS TRYING TO HIDE.

NHTSA ID

11089830

Incident

Apr 13, 2018

Mileage

34,500 mi

VEHICLE JUST SHUT OFF WHILE IN OPERATION THEN WOULD TURN OVER BUT NO START. VEHICLE WAS TOWED TO DEALERSHIP AND WAS ADVISED FUEL PUMP FAILED AND WOULD BE COVERED UNDER WARRANTY. LUCKILY VEHICLE WAS STATIONARY BUT WAS IN PREPARTION FOR A VACATION PULLING OUR 5TH WHEEL CAMPER. FROM RESEARCHING SINCE THIS INCIDENT, I'VE BEEN IN CONTACT WITH SEVERAL INDIVIDUALS WHO HAVE HAD THIS PART FAIL NOT ONLY WHILE MOVING BUT HAVE HAD IT HAPPEN TWICE. EVEN THE SERVICE ADVISOR'S ACKNOWLEDGE THAT THIS PART IS A KNOWN FAILURE ITEM AND WILL HAPPEN AGAIN. SERVICE DEPARTMENT HAD VEHICLE FOR 2 WEEKS.

NHTSA ID

11081742

Incident

Mar 9, 2018

Mileage

28,800 mi