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Home >> Pontiac >> 1971 >> GTO Base, 6.6L Eng, Eng CD WS, Not Available Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Component Replacement >> Component Replacement Cautions >> Before Opening the System

Before Opening the System

Before disconnecting any lines or fittings, the system must be completely discharged (except for removal of compressor where "Stem Type" service valves are used - see ISOLATING COMPRESSOR  below). See DISCHARGING THE SYSTEM  .