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Home >> GMC >> 1983 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> A/C-Heater System - Manual >> Operation >> System Controls >> Mode Control Lever
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Mode Control Lever

Mode lever controls a vacuum operated selector valve to operate air door motors, providing desired air distribution. It also allows for selection of air conditioning or heating functions, including defroster air distribution.

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