GMC 2018 Terrain Owner's Manual page 153

152 Climate Controls
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 the
vehicle.
Clear snow off the hood to
improve visibility and help
decrease moisture drawn into
the vehicle, which may improve
long term system performance.
Keep the path under the front
seats clear of objects to help
circulate the air inside of the
vehicle more effectively.
Use of non-GM approved hood
deflectors can adversely affect
the performance of the system.
Check with your dealer before
adding equipment to the outside
of the vehicle.
Do not attach any devices to the
air vent slats. This restricts
airflow and may cause damage
to the air vents.
Maintenance
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.
See Maintenance Schedule 0 290.
To find out what type of filter to use,
see Maintenance Replacement
Parts 0 295.
1. Open the glove box.