Discharging System
WARNING: This page does not describe the selected car, but rather 60 other vehicles, including the 1995 Pontiac Trans Sport, 1995 Pontiac Sunfire, 1995 Pontiac Grand Prix, 1995 Pontiac Grand Am, and 1995 Pontiac Firebird. However, it is still accessible from the selected car via links, so may be relevant.
If compressor has stem-type service valves, it can be isolated and removed without discharging entire system. Otherwise, discharge A/C system using approved refrigerant recovery/recycling equipment before loosening any fittings.