Four Seasons 6449R A/C Compressor Kit

Four Seasons PAC-Kit A/C Compressor Kit

Four Seasons 6449R is a PAC-Kit w/ Reman Compressor for classic GM vehicles that use an A6 compressor setup. It is built for direct-fit service on select 1977-1979 Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac applications, including models such as the Riviera, Eldorado, Nova, Firebird, and Grand Am.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for A/C compressor replacement
• Fits select 1977-1979 Buick Riviera, Cadillac Eldorado, Chevrolet Nova, Oldsmobile Toronado, and Pontiac Firebird applications
• Also fits Pontiac Grand Am, Grand LeMans, Parisienne, Grand Prix, and LeMans applications listed below
• Application notes include A6 compressor configurations and pulley-specific requirements on certain vehicles
• Part number 6449R for catalog and fitment lookup

Detailed Description

This Four Seasons A/C compressor kit is cataloged for vehicles equipped with an A6 compressor, with fitment notes that vary by model and year. The 6449R listing covers 1977-1979 Chevrolet Nova and Pontiac Firebird applications with a 5-inch diameter pulley note, plus 1978-1979 Pontiac Grand Am and 1977 Pontiac Grand Prix with the same pulley requirement. It also includes 1977-1978 Cadillac Commercial Chassis applications with single-groove pulley, 5.12-inch pulley, and high-pressure switch notes. Use the part number 6449R when matching the correct compressor kit to the vehicle’s original A/C configuration.

Vehicle Fitment

• Fits 1979 Buick Riviera, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1979 Cadillac Eldorado, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977-1979 Chevrolet Nova, N/A — w/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1979 Oldsmobile Toronado, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977-1979 Pontiac Firebird, N/A — w/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1978-1979 Pontiac Grand Am, N/A — w/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977-1979 Pontiac Grand LeMans, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977-1979 Pontiac Parisienne, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977-1978 Cadillac Commercial Chassis, N/A — w/ A6 Compressor; Compressor w/ Single Groove Pulley; Compressor w/ 5.12" Pulley; Compressor w/ High Pressure Switch; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977 Pontiac Grand Prix, N/A — w/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
• Fits 1977 Pontiac LeMans, N/A — w/ A6 Compressor; 57094 (Reman Compressor), 33205 (Accum), 38623 (Orifice), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor

Common Repair Uses

• Restores A/C compressor operation on classic GM vehicles with an A6 system
• Addresses compressor noise, seizure, or loss of cooling performance
• Supports repair of vehicles showing pulley or compressor configuration mismatch
• Helps correct refrigerant circulation issues tied to worn compressor components
• Provides a cataloged replacement path for 1977-1979 Buick Riviera and Pontiac Firebird A/C service

Installation Notes and Tips

Verify the vehicle’s compressor style and pulley configuration before ordering. This listing includes application-specific notes for A6 compressor systems, and some vehicles require a 5-inch pulley, single-groove pulley, 5.12-inch pulley, or high-pressure switch configuration. Confirm the original A/C layout on the Buick Riviera, Cadillac Eldorado, Chevrolet Nova, and Pontiac Firebird before installation.

Quality Assurance

Four Seasons catalogs this PAC-Kit under part number 6449R for defined OE-style applications. Match the vehicle notes carefully to ensure the correct compressor kit is selected for the original A/C system.