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well unless you have the right equipment, the dealer.
This vehicle does not have a low pressure switch. It has a pressure transducer instead. The pressure transducer is located on the refrigerant line next to the alternator pulley.
Virtually all vehicles since 1994 use refrigerant r-134a. On a 97 Suburban, the suction (low pressure) and discharge (high pressure) ports are located on top of the compressor. Refrigerant is added to the low pressure side. It is attached to the larger refrigerant piping and hose which runs to the accumulator-drier at the firewall. The smaller high pressure pipe attaches to the condenser located in front of the radiator. Do NOT attach a refrigerant can to the high pressure line.
to minimize venting of refrigerants
Located in the front of the engine compartment between the radiator and the engine.
to minimize venting of refrigerants
the low pressure{or suction}line is located under the air filter housing
The Refrigerant Pressure Sensor / Switch will be located just to the left of the alternator pulley on the firewall....
to minimize venting of refrigerants
The low pressure AC port on a 2000 Buick Century is located on the accumulator. It is used to fill the system with refrigerant and to check pressure levels.
the rupture disc is piped off the chiller barrel (evaporator) and will vent the refrigerant outside incase of over pressure of the unit
On my service DVD i cant seem to find a low pressure switch. i did find a AC refrigerant pressure switch i dont knwo if its the same