GMC Terrain: Diesel Exhaust Fluid / Filling the DEF Tank

GMC Terrain. Filling the DEF Tank

Caution

Use only DEF that is GM approved, or fluid containing the API certified or ISO 22241 label. The use of other fluids could damage the system, requiring costly repairs that will not be covered by the vehicle warranty.

Caution

Do not mix fuel with DEF, and do not put DEF in the fuel tank. This could lead to costly repairs that might not be covered by the vehicle warranty.

It is recommended to fill the DEF tank on level ground and when the vehicle is not running. When adding fluid, it is recommended to fill the DEF tank.

Caution

Do not overfill the DEF tank and do not allow DEF to contact the finished surfaces of the vehicle, as it could damage the vehicle finish. If DEF is spilled during filling, wipe any affected surface with a damp cloth.

Do not top off the DEF tank. If using a bottle or jug to refill DEF, follow the instructions on the container label and use a dedicated fill aid. In certain cold conditions, it is possible to find some frozen DEF in the DEF fill pipe opening. If this condition prevents the filling of a DEF tank, place the vehicle in a warm garage overnight.

For information on how to fill the DEF tank, see Filling the Tank (Gasoline) or Filling the Tank (Diesel).

    Diesel Exhaust Fluid

    Warning Avoid getting Diesel Exhaust Fluid (DEF) on your skin or in your eyes as it could cause irritation. For more safety, handling, and storage information, see the Diesel Exhaust Fluid container label...

    Exhaust Fluid Low

    A full DEF tank will last for several thousand kilometers (miles), depending on vehicle usage. As the exhaust fluid level drops, warnings will automatically be displayed in the DIC...

    Other information:

    GMC Terrain 2018-2026 Owners Manual: Jump Starting


    For more information about the vehicle battery, see Battery - North America. If the battery has run down, try to use another vehicle and some jumper cables to start your vehicle. Be sure to use the following steps to do it safely. Warning WARNING: Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer..

    GMC Terrain 2018-2026 Owners Manual: Seat Belt Use During Pregnancy


    Seat belts work for everyone, including pregnant women. Like all occupants, they are more likely to be seriously injured if they do not wear seat belts. A pregnant woman should wear a lap-shoulder belt, and the lap portion should be worn as low as possible, below the rounding, throughout the pregnancy. The best way to protect the fetus is to protect the mother. When a seat belt is worn ..

    Copyright © 2026 www.gmcterrain2.com