Four Seasons 4056R A/C Compressor Kit

Four Seasons 4056R PAC-Kit w/ Reman Compressor

Four Seasons 4056R is an A/C compressor kit for classic Buick and Pontiac applications that use an A6 compressor and expansion valve setup. This PAC-Kit w/ Reman Compressor supports targeted HVAC service for vehicles such as the Buick LeSabre, Buick Skylark, Buick Riviera, Pontiac Grand Prix, Pontiac Bonneville, and Pontiac Catalina.

Key Features

• Part number 4056R from Four Seasons
• PAC-Kit w/ Reman Compressor for A/C compressor service
• Application-specific fitment for select 1968-1972 Buick and Pontiac models
• Notes include A6 compressor and expansion valve configurations where listed
• Fits vehicles with single-groove pulley and 6" diameter pulley applications where specified

Fitment Details

• Fits 1970-1972 Buick LeSabre, N/A — w/ A6 Compressor; w/ Expansion Valve; Compressor w/ Single Groove Pulley; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1971-1972 Buick Skylark, N/A — 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1968-1972 Pontiac Grand Prix, N/A — w/ A6 Compressor; w/ Expansion Valve; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1970 Buick Riviera, N/A — w/ A6 Compressor; w/ Expansion Valve; Compressor w/ Single Groove Pulley; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1968-1970 Pontiac Bonneville, N/A — w/ A6 Compressor; w/ Expansion Valve; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1968-1970 Pontiac Catalina, N/A — w/ A6 Compressor; w/ Expansion Valve; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1968-1969 Buick LeSabre, N/A — w/ A6 Compressor; Compressor w/ Single Groove Pulley; Compressor w/ 6" Dia. Pulley; 57087 (Reman Compressor), 33213 (Filter Drier), 38622 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor

Product Description

This Four Seasons A/C compressor kit is built for owners servicing original-style air conditioning systems on Buick and Pontiac vehicles from 1968-1972. If you are replacing a worn compressor on a Buick LeSabre, Pontiac Grand Prix, or Pontiac Catalina, part number 4056R provides a fitment-specific solution for the listed A6 compressor applications.

The PAC-Kit w/ Reman Compressor line focuses on compressor replacement for vehicles that use matching pulley and expansion valve configurations. For searches such as Buick LeSabre A/C compressor kit 4056R, Pontiac Grand Prix reman compressor kit, or classic GM A/C compressor replacement for A6 systems, this part matches the listed vehicle and system notes exactly.

Common Problems This Part Addresses

• Compressor noise or internal wear
• Loss of A/C cooling performance
• System issues tied to an aging reman compressor
• Fitment problems on A6 compressor applications with the listed pulley setup
• Service needs on classic Buick and Pontiac HVAC systems

Installation Notes

Verify the vehicle’s compressor style, pulley configuration, and expansion valve setup before installation. Match the application notes for the exact Buick or Pontiac model and year, and confirm the listed system components before replacing the compressor. Part number 4056R is intended for the specific fitments shown above, including Buick LeSabre, Buick Skylark, Buick Riviera, Pontiac Grand Prix, Pontiac Bonneville, and Pontiac Catalina.

Quality Assurance

Four Seasons is a recognized aftermarket brand for HVAC service parts, and this PAC-Kit w/ Reman Compressor is cataloged for the exact applications shown in the fitment data. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.