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
"Fuel pressure sensor failed causing engine to immediately go in to low power mode..on a highway. Dangerous at best but was able to limp home and had it towed to dealer. Also found electrical connection to sensor was corroded, which could have been the actual problem. Corrosion likely from spilled DEF as the filler tube is directly above the sensor/connector in engine compartment (this was relocated 2019 and beyond to next to fuel filler tube."
Anonymous A., TX (2018 Chevrolet Silverado 2500HD High Country 6.6-L V8 diesel)
"DPF Sensor"
Anonymous, CO (2018 Chevrolet Silverado 2500HD LTZ 6.6-L V8 diesel)