Workshop Repair and Service Manuals GMC SIERRA
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Climate Control Systems

Sensors      The solar sensor, located in the defrost grille in the middle of the instrument panel, monitors the solar heat. Do not cover the solar sensor or the system will not work properly. The interior temperature sensor,...
Rear Window Defogger      The rear window defogger uses a warming grid to remove fog from the rear window. (Rear Window Defogger): For vehicles with this feature, press to turn the defogger on or off. It automatically turns off several minutes...
Rear Window Defogger      For vehicles with a rear window defogger, a warming grid is used to remove fog from the rear window. (Rear): Press to turn the rear window defogger on or off. An indicator light on the button comes on to show that the...
Dual Automatic Climate Control System      The heating, cooling, and ventilation in the vehicle can be controlled with this system. The vehicle also has a flow-through ventilation system described later in this section. A. Driver and Passenger Temperature Controls...
Manual Operation      (Fan Control): Press these buttons to increase or decrease the fan speed. Pressing either fan button while in automatic control places the fan under manual control. The fan setting remains displayed and the AUTO light...
Climate Control Systems (with Air Conditioning)      With this system the heating, cooling, and ventilation can be controlled. A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning E. Outside Air F. Recirculation G. Rear Window...
Climate Control Systems (with Heater Only)      With this system the heating and ventilation can be controlled. A. Fan Control B. Temperature Control C. Air Delivery Mode Control Temperature Control: Turn clockwise or counterclockwise to increase or decrease the...
Automatic Operation      AUTO (Automatic): When automatic operation is active, the system controls the inside temperature, the air delivery, and the fan speed. Use the steps below to place the entire system in automatic mode: 1. Press the AUTO...
Driver and Passenger Side Temperature Controls      The driver and passenger side temperature buttons are used to adjust the temperature of the air coming through the system on the driver or passenger side of the vehicle. The temperature can be adjusted even if the system is...