Four Seasons 58957 A/C Compressor

Four Seasons 58957 A/C Compressor

The Four Seasons New Compressor 58957 is a GM-style HD6 A/C compressor built for R134a systems and filled with PAG 150 oil. It includes the clutch and a high-pressure switch, making it a direct replacement option for select 1995 Buick, Oldsmobile, and Pontiac applications.

Key Features

• New Four Seasons A/C compressor, part number 58957
• HD6 compressor type for GM HVAC applications
• R134a refrigerant type with PAG 150 compatible oil
• Clutch included with 12V coil voltage
• High-pressure switch included
• Serpentine belt pulley with 6 grooves
• Type VI mounting style with 2-1/2 ears
• Sealing washer suction port design with O-ring sealing washer connections

Product Details

Four Seasons 58957 is a new GM A/C compressor engineered for vehicles using the HD6 compressor platform. It is configured for R134a refrigerant, uses PAG 150 oil, and features a serpentine pulley with six grooves for proper belt engagement. The compressor includes the clutch and a high-pressure switch, and it uses a pin terminal connection with a 12-volt coil. This part cross-references Delphi CS0086 for the same application.

Compatible With 1995 Buick Park Avenue, N/A; 1995 Buick Riviera, N/A; 1995 Oldsmobile 88, N/A; 1995 Oldsmobile 98, N/A; and 1995 Pontiac Bonneville, N/A. These fitments are listed for vehicles equipped with the HD6 compressor setup, including applications noted as new with clutch and, where specified, use of PAG 150 compressor oil. If you are replacing a worn GM A/C compressor on a 1995 Buick Park Avenue or Pontiac Bonneville, this part number 58957 is matched to those exact vehicle listings.

Common Problems This Part Addresses

• Loss of cabin cooling from a failed compressor
• Noisy or seized A/C compressor operation
• Clutch engagement problems in the air conditioning system
• High-pressure switch-related A/C shutdown concerns
• Refrigerant circulation issues in R134a systems

Installation Notes and Tips

Verify the vehicle uses the HD6 compressor configuration before installation. Confirm refrigerant type, oil specification, pulley groove count, and mounting style against the original unit. Flush the system as needed, replace sealing washers during service, and charge with PAG 150 oil per the vehicle service procedure. Check belt alignment and electrical connector fitment before final assembly.

Quality Assurance

Four Seasons supplies replacement HVAC components for automotive air conditioning service, and this new compressor is built to match the listed GM applications for proper fit and function. Part number 58957 is specified for select 1995 Buick, Oldsmobile, and Pontiac models with HD6 compressor systems.