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Home >> Chevrolet >> 2005 >> Optra5 Base, Automatic >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC Systems - Manual >> Introduction >> Manual HVAC General Information >> System Components - Control >> Vacuum Tank

Vacuum Tank

During heavy acceleration, the vacuum supply from the manifold drops. A check valve in the vacuum tank maintains vacuum so that under load conditions vacuum will be available for continuous use.