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GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-14632286) - 2021 - CRC - 11/19/20
Climate Controls
205
Climate Controls
Climate Control Systems
Climate Control Systems . . . . . . . . . . . . . . 205
Dual Automatic Climate Control
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Maintenance
Passenger Compartment Air Filter . . . . . 210
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Climate Control Systems
The heating, cooling, and ventilation in the vehicle can be controlled with this system.
1. Fan Control
2. MAX Defrost
3. Air Delivery Mode Controls
4. A/C (Air Conditioning)
5. TEMP (Temperature Control)
6. Recirculation
7. Rear Window Defogger (If Equipped) or
Heated Mirrors (If Equipped)
9
:
Turn clockwise or counterclockwise to
increase or decrease the fan speed. Turn the
knob all the way counterclockwise to turn
the fan off.
TEMP :
Turn clockwise or counterclockwise
to increase or decrease the temperature
inside the vehicle.