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Home >> Buick >> 1979 >> Skyhawk Base, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heaters >> Operation >> System Controls >> All Models (Exc. Skylark) >> Mode Lever

Mode Lever

This lever regulates the heat-defrost door and the vent door. This regulates flow of air to defroster outlets, floor outlets and vent outlets.

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