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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 223 (HVAC Systems - Manual) >> Description and Operation >> Air Temperature Description and Operation >> HVAC Control Components >> Heater Mode - Auxiliary Heater without A/C

Heater Mode - Auxiliary Heater without A/C

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The auxiliary blower motor recycles air from the vehicle's interior. The vehicle operator can determine the intensity of the auxiliary heater by placing the auxiliary blower motor in one of the following positions:

Since there is no temperature switch, the temperature is controlled by the speed of the auxiliary blower motor. The auxiliary blower motor will only operate when the ignition is in the RUN position, and the auxiliary blower motor switch is in any position other than OFF.

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