2015 Chevrolet Silverado 3500: sudden loss of power

Filed Jul 19, 2026 · Fuel system · OR

I own a 2015 Chevrolet Silverado 3500HD Duramax diesel. At approximately 130,000 miles, the high-pressure CP4 fuel pump failed internally, sending metal shavings throughout the fuel system and contaminating major components. The truck suddenly lost power on the freeway and became inoperable without warning. I was barely able to get out of traffic before it had to be towed to a Chevrolet dealership. This created a serious safety hazard, especially considering the risk if it had happened while towing my fifth wheel with my family. A failure like this should not happen at this mileage on a heavy-duty diesel truck. I also cannot afford the extremely high cost of repairing the entire fuel system. From my research, many other owners have experienced the same CP4 fuel pump failure, which often destroys the entire fuel system and leads to very expensive repairs. I believe this is a widespread defect, not normal wear and tear. I ask the federal safety agency to review these failures and take action to protect vehicle owners from similar dangerous and costly failures. This truck currently sits at the dealership as I cannot afford the repairs and GM will not fix what they know is faulty parts.

Filed May 24, 2024 · Fuel system · ID

Bosch CP4 fuel pump failed 400 miles from home leaving us stranded. We were towed in and spent thousands of dollars and 5 weeks to have the truck repaired. Only warning was that the truck was losing power and barely got off the road.

Filed Jan 4, 2023 · Acceleration, Brakes · KY

There are several problems I’ve noticed some I fix myself! First of all, I was driving my truck at night on the country road and all of a sudden it starts losing power shut down on me on a little road with no pull over spots in Kentucky and just dies completely. My service charging system light came on. I worked on this forever. I noticed it. All of my grounds were completely nasty and pretty much not making contact. I fix the ones that I can find only two I know there’s more, I’ve changed the generator three times and the battery once, the problem happened again and again and again the only way I can stop my truck from dying is when that light come on if I got out and I took the negative wire off of my battery and then put it back on it would run again for about another three days and then if I didn’t see it, I’m stranded very dangerous. Finally I took it to my mechanic up the road and he basically did the same things. I did something about a door switch also though not another battery another generator and he added new battery cables so far it hasn’t done it again. Now my truck when starting to slow down, it will vibrate and shake you to death. You hit a little vibration in the road say a rumble strip. This thing will shake you through the roof in about make you run into another Vehicle , also, it’s hard to fill up the gas if you have to turn the gas nozzle almost straight up and down if you’re low on gas to make it except it or you’ll be sitting there for 30 minutes putting gas in your truck. I noticed also all of my wheels are having rough spots on them everywhere and they are rusting into . Another thing that happens this truck eats breaks for breakfast. I have put in the past two years at least have the change the brakes, calipers rotors and all twice a year sometimes three times a year. Also, the trailer brake system light comes on nonstop along with a service stability track on when happen. No Wasey no cruise control. I am a masterelect. Maintain truck it ju

Filed Sep 14, 2020 · Electrical · 43,000 miles · TN

Engine loss power while pulling a loaded horse trailer around 10,000 pounds. Error message saying power has been reduced. The top speed while on a hill was abiut 15 miles an hour.tractor traillers had to manuver around me due to the low speed on an expressway with 70 mile an hour speed limit. The dealer said cause was fraying of the wiring harness probably around the turbo. After research on the internet, I found this was a frequent problem. Truck only has 43,000 miles on it. I have requested the old wiring harness for inspection.

Filed Jun 14, 2017 · Fuel system · 52,000 miles · TX

My chevy silverado 3500 duramax diesel truck had around 52,000 miles on the odometer & was stationary when the fuel injection check ball exploded (according to the dealership) & caused the engine to stop & become immobile. The truck was towed to the nearest dealership & repaired @ around $12,000 worth of damage. Warranty covered it @ 100% & the vehicle is back running. I live in a farming/ranching part of the USA where multiple people drive diesel pickups. I have talked to multiple people who have had the exact same problem with their chevy duramax trucks (according to their dealership). When this condition occurred on their vehicles, they were driving & the vehicle became immobile. This concerns me because when the engine stops when driving you could lose power steering/full braking ability. I have a family as well as others, I do not know of any deaths related to this issue, but no engine power could result in loss of power steering/full braking ability, resulting in equipment/bodily injury. I contacted chevy customer support & submitted a claim, they said they would submit the claim to the recall department. Chevy also contacted the dealership & spoke with the service guy to confirm my claim, he said he confirmed the multiple occurrences that they have seen. As a matter of a fact, another chevy duramax was towed to the dealership with the exact issue, while my truck was being repaired. The dealership confirmed that chevy has not fixed the issue with the fuel injection system, so the repairs were made with the exact same faulty (new parts), according to the dealership. When searching for this issue on the web, multiple of the same occurrences are listed. In my opinion this issue needs to be evaluated with a corrective action put in place to prevent further incidents similar to this from happening.

Filed Oct 5, 2016 · Engine · 96,000 miles · NY

Tl* the contact owns a 2015 chevrolet silverado 3500. While driving 65 MPH, the vehicle lost power without warning. The vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed that there were metal fragments inside the engine. The manufacturer was not notified of the failure. The failure mileage was approximately 96,000.