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Home >> GMC >> 1983 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> Operation >> System Controls >> Temperature Control Lever
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Temperature Control Lever

The lower lever on the control panel controls discharge air temperature in all Mode Control Lever positions. Full right position provides maximum heat. Full left position provides cool (outside) air.

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