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
"Muffler has developed a leak and the sensor indicates that the catalytic converter is not functioning properly"
Anonymous, MO (2014 GMC Terrain SLE 2.4-L 4 Cyl)
"Replaced valve"
Anonymous, NC (2014 GMC Terrain SLT 3.6-L V6)