2015 GMC Sierra 2500: sudden loss of power

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 Oct 22, 2022 · Electrical · LA

Water intrusion from antenna ran down into my wires causing corrosion in my electrical harness. Truck will throw code p2138 and go into reduced power mode. Very dangerous when you are in traffic. Truck will not go over 15mph when this happens. This has been a problem intermittently since I have owned the truck at 119000 miles . Gotten progressively worse.

Filed Mar 22, 2021 · Engine · 56,930 miles · OR

Lost power at 60 MPH on 5 lane freeway on 6% grade with no warning when turbo charger variable vane got stuck. Had to navigate through 2 lanes of trucks to get into the emergency parking lane. Computer limited me to 15 MPH. Computer designed to do this. No accident happened due to some very courteous truck drivers. It seemed like a safety issue to me, but don't know if it is important enough for your to investigate.

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 Dec 3, 2018 · Engine, Fuel system · 74,000 miles · PA

Duramax diesel engine fuel injection pump broke with no notice while driving causing a total loss of power. Failure repair under warranty required replacement of pump, injectors, lines, filters and flush of fuel tank.

Filed Sep 6, 2017 · Fuel system · 105,712 miles · TN

My vehicle's engine stopped running while I was driving on a very busy road. I lost power steering, power brakes, everything. Other motorists were swerving to avoid me. I had the truck towed to a gm dealer, and they diagnosed the problem as the fuel injector pump. I researched this online, and found that this is a common issue! This should be a major safety concern since it's causing vehicles to simply stop running at any given speed on any given highway!