GMC Terrain: Performance and Maintenance / Diesel Particulate Filter

The engine is equipped with a Diesel Particulate Filter (DPF) that will filter or trap particulates. The DPF is under the vehicle in the exhaust system.

Depending on a number of factors monitored by the engine computer, the DPF will need to be cleaned of accumulated solids. When a cleaning is needed, the engine computer will initiate a cleaning action by warming the exhaust gas temperature. This feature has been designed to operate automatically, with limited operator involvement or awareness.

Cleaning the DPF (Exhaust Filter)

While the DPF cleaning is automatically controlled by the engine computer, the vehicle will need to operate continuously for approximately 25 minutes and at speeds greater than 50 km/h (30 mph) to clean the DPF effectively.

Special DPF Driver Messages

If the vehicle is used for numerous short trips or extended slow-speed operation, the engine computer may not be able to clean the DPF effectively. If this happens, a Driver Information Center (DIC) message will display.

If the vehicle continues to be driven in a manner that prevents effective DPF cleaning, the DPF will become plugged. If this occurs, the engine computer will turn on the malfunction indicator lamp in the instrument cluster and a DIC message will display. See Diesel Particulate Filter, Fuel for Diesel Engines and Engine Oil.

    Driving for Better Fuel Economy

    Driving habits can affect fuel mileage. Here are some driving tips to get the best fuel economy possible: Set the climate controls to the desired temperature after the engine is started, or turn them off when not required...

    Diesel Exhaust Fluid

    Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly...

    Other information:

    GMC Terrain 2018-2021 Owners Manual: Low Fuel Warning Light


    For the base level cluster, this light comes on when the fuel tank is low on fuel. The light turns off when fuel is added. If it does not, have the vehicle serviced. For the uplevel cluster, this light is near the fuel gauge and comes on briefly when the ignition is turned on as a check to show it is working...

    GMC Terrain 2018-2021 Owners Manual: General Information


    For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: California Proposition 65 Warning Warning Most motor vehicles, including this one, as well as many of its service parts and fluids, contain and/or emit chemicals known to the State of California to cause cancer and birth..

      Categories

      Engine Overheating

      The vehicle has an engine coolant temperature gauge on the instrument cluster and overheat messages in the Driver Information Center (DIC) to warn of engine overheating. See Engine Coolant Temperature Gauge.

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