air condition GMC TERRAIN 2021 Get To Know Guide
Page 10 of 20
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CLIMATE CONTROLS
F Optional equipment
Fan Speed Control or Driver’s Temperature ControlF
A/C Air Conditioning Control   Vent Mode
 Fan Speed Control/Power On-OffF
AUTO  Automatic OperationF
  Recirculation Mode
 Rear Window  Defog/Heated Outside Mirrors Control
  Floor Mode  Bi-level Mode
SYNCF Synchronize passenger’s temperature setting to driver’s temperature setting
   Defrost Mode
Passenger’s Temperature ControlF  Defog Mode
AUTOMATIC OPERATIONF
 Press AUTO.
 Set the temperature. 
The system automatically controls the fan speed, air delivery, air conditioning and  
recirculation functions to maintain the set temperature. Allow time for the system to reach the desired temperature. If the functions are manually adjusted, the Auto indicator turns off and automatic operation for that function is canceled.
AUTO DEFOGF AND AUTO REAR WINDOW DEFOGF
Auto Defog and Auto Rear Defog automatically turn on when the engine is started.
 Go to Settings > Vehicle > Climate and Air Quality to turn the Auto Defog and Auto Rear Defog settings on or off.
See Climate Controls in your Owner’s Manual.
Dual Automatic Climate ControlsF shown