GMC Terrain: Maintenance / Service

All vehicles have a label underhood that identifies the refrigerant used in the vehicle. The refrigerant system should only be serviced by trained and certified technicians. The air conditioning evaporator should never be repaired or replaced by one from a salvage vehicle. It should only be replaced by a new evaporator to ensure proper and safe operation.

During service, all refrigerants should be reclaimed with proper equipment. Venting refrigerants directly to the atmosphere is harmful to the environment and may also create unsafe conditions based on inhalation, combustion, frostbite, or other health-based concerns.

The air conditioning system requires periodic maintenance. See Maintenance Schedule.

    Passenger Compartment Air Filter

    The filter removes dust, pollen, and other airborne irritants from outside air that is pulled into the vehicle. The filter should be replaced as part of routine scheduled maintenance...

    Driving and Operating

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    Other information:

    GMC Terrain 2018-2025 Owners Manual: Air Vents


    Use the louvers located on the air vents to change the direction of the airflow. To open or close off the airflow: On the center air vents, move the slider knobs up or down. On the outer and rear air vents, move the slider knobs right or left. Operation Tips Clear away any ice, snow, or leaves from air inlets at the base of the windshield that could block the flow of air into t..

    GMC Terrain 2018-2025 Owners Manual: If the On Indicator Is Lit for a Child Restraint


    The passenger sensing system is designed to turn off the front outboard passenger frontal airbag if the system determines that an infant is present in a child restraint. If a child restraint has been installed and the ON indicator is lit: Turn the vehicle off. Remove the child restraint from the vehicle. Remove any additional items from the seat such as blankets, cushions, seat cov..

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