Fuel System/Emissions
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
What Owners Say
"The fuel pump module driver failed while towing our fifth wheel camper on interstate at 70 mph. The engine shut down and we had to pull over to the shoulder with no power. Fortunately there was a GMC dealership near there. We had to arrange a tow for the truck and camper. It was scary being stranded on the side of the road at night. We broke down on Friday and the vehicle was repaired by Monday evening. The truck only had 5000 miles on it when this part failed. The experience has left us with a nervous feeling every time we travel out of town towing our camper."
Anonymous A., LA (2024 GMC Sierra 3500HD Denali 6.6-L V8 diesel)
"Fuel pump module driver failed on interstate at 70 mph while towing our camper with no warning. The engine shut off and we had to pull onto the shoulder with no power. Had to be towed to the dealership. It was a scary and dangerous night."
Anonymous A., LA (2024 GMC Sierra 3500HD Denali 6.6-L V8 diesel)