GMC Terrain: Driving and Operating / 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.
Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. Products such as AdBlue are types of DEF, and are approved for use in the vehicle as long as they have an API certification label or meet ISO 22241.The fluid level in the DEF tank must be maintained for the vehicle to run properly. DEF is not a fuel additive. DEF should not be mixed with or added to diesel fuel. DEF freezes when exposed to temperatures below −11 °C (12 ° F).
It is normal to hear the DEF system purge fluid back into the tank after the vehicle is shut off.
Locating Diesel Exhaust Fluid
DEF can be purchased at your dealer. It can also be purchased at authorized vehicle and truck dealerships. Additionally, some diesel truck fueling stations or retailers may have DEF for purchase. For vehicles with an active OnStar or connected services plan, OnStar can help to locate a DEF retailer. See Customer Assistance Offices for phone numbers to assist in contacting a GM dealer. See Recommended Fluids and Lubricants.
- Filling the DEF Tank
- Exhaust Fluid Low
- Exhaust Fluid Quality Poor
- Service Exhaust Fluid System
- Service Emission System
Diesel Particulate Filter
The Diesel Particulate Filter (DPF)
system filters soot particles out of
the exhaust gases. 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...
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...
Other information:
GMC Terrain 2018-2022 Owners Manual: Windshield Wiper/Washer
The windshield wiper/washer lever is on the side of the steering column. With the ignition on or in ACC/ACCESSORY, move the windshield wiper lever to select the wiper speed. HI : Use for fast wipes. LO : Use for slow wipes. INT : Move the lever up to INT for intermittent wipes, then turn the band up for more frequent wipes or down for less frequent wipes...
GMC Terrain 2018-2022 Owners Manual: Reducing Speed While Using Cruise Control
If the cruise control system is already activated: Press and hold –SET until the desired lower speed is reached, then release it. To slow down in small increments, briefly press –SET. For each press, the vehicle goes about 1 km/h (1 mph) slower...
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Tire Pressure Light
For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when the engine is started. It provides information about tire pressures and the TPMS.
