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
"1st---Changed fuel filter and mechanic found metal shaving in fuel filter. GM changed entire fuel system from pump thru injectors. Haven't had fuel filter change since then. 2nd---Radiator reservoir tank sensor for low fluid had gone bad for the 2nd time since I bought it used 2020 - 2025."
Anonymous, MO (2018 Chevrolet Silverado 2500HD LTZ 6.6-L V8 diesel)"I just purchased truck last week, previous owner said the def pump was just replaced, there is engine code p026d, NOX sensor which found upper MAP located in EGR sensor caked in carbon. Reading online about issues and how they are resolving these common issues."
Anonymous, AR (2018 Chevrolet Silverado 2500HD High Country 6.6-L V8 diesel)
"I'm currently working on the issue waiting on device from Banks Power to help prevent carbon from collecting on the sensor, hoping this is only issue."
Anonymous, AR (2018 Chevrolet Silverado 2500HD High Country 6.6-L V8 diesel)