Four Seasons 1901R A/C Compressor and Component Kit

Four Seasons PAC-Kit w/ Reman Compressor 1901R

Four Seasons 1901R is a PAC-Kit with reman compressor for select GM vehicles using the R4 A/C compressor platform. It is built for direct replacement service on applications that call for a remanufactured compressor, accumulator, orifice tube, flush, and oil service components listed in the fitment data.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor
• Part number 1901R for A/C compressor kit identification
• Reman compressor application for R4-equipped systems
• Fits select 1982-1985 Buick, Cadillac, Chevrolet, and Oldsmobile models
• Application notes include pulley, thread, and switch-specific requirements where listed

Application Details

This Four Seasons PAC-Kit w/ Reman Compressor 1901R is listed for 1982-1985 Buick Century, 1985 Buick LeSabre, 1984-1985 Buick Riviera, 1985 Cadillac DeVille, 1983 Chevrolet Celebrity, 1982 Oldsmobile Cutlass Ciera, and 1984-1985 Oldsmobile Toronado. Use the fitment notes to confirm R4 compressor configuration, pulley diameter, metric threads, single-groove pulley, and switch requirements before ordering.

What It Helps Address

• Loss of cabin cooling from a worn or failed A/C compressor
• Noisy compressor operation in an R4-based HVAC system
• Incorrect compressor fitment caused by pulley or thread mismatch
• Service needs on older Buick, Cadillac, Chevrolet, and Oldsmobile A/C systems
• Restoration or repair of factory-style air conditioning performance

Installation Notes and Tips

Verify the vehicle’s compressor style and the notes shown for each application before installation. Confirm pulley diameter, thread type, groove count, and switch configuration where specified. Follow standard A/C service procedures, including system evacuation, flushing where required, and proper oil handling for the replacement compressor.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repair, and this kit is cataloged for the exact vehicle applications shown above. Part number 1901R should be matched to the listed fitment and compressor configuration for accurate replacement.