GMC Chevrolet Express 2022 Owner's Manual page 118

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Operation Tips
Clear away any ice, snow or leaves from
the air inlets at the base of the
windshield that may block the flow of air
into the vehicle.
Use of non-GM approved hood deflectors
may adversely affect the performance of
the system.
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.
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
0 224.
Climate Controls
117

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