GMC SIERRA 2020 Owner's Manual page 184

Clear snow off the hood to
improve visibility and help
decrease moisture drawn into
the vehicle.
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.
Maintenance
Passenger Compartment
Air Filter
The filter reduces the 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 0 441.
To find out what type of filter to use,
see Maintenance Replacement
Parts 0 454.
Climate Controls
1. Open the lower glove box door
completely.
2. Push the dampener arm to the
left until it releases the
glovebox.
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