Four Seasons 1901N A/C Compressor and Component Kit

Four Seasons 1901N A/C Compressor Kit

Four Seasons 1901N is a PAC-Kit with a new compressor for R4-equipped GM vehicles. It is built for direct replacement service on select Buick, Cadillac, Chevrolet, and Oldsmobile applications where the original air conditioning compressor has failed or the system has been opened for repair.

The Four Seasons PAC-Kit line combines the compressor with matched A/C service components for a more complete repair approach. This kit 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 applications with R4 compressor configurations.

• Brand: Four Seasons
• Part number: 1901N
• Category: A/C compressor kit
• PAC-Kit with new compressor
• For vehicles with R4 compressor applications
• Fitment includes Buick Century, Buick LeSabre, Buick Riviera, Cadillac DeVille, Chevrolet Celebrity, Oldsmobile Cutlass Ciera, and Oldsmobile Toronado

Detailed Fitment and Application

Use Four Seasons 1901N when servicing an R4 compressor system on the listed GM platforms. Fitment notes identify specific pulley and thread configurations for certain Buick Century and Buick LeSabre applications, including 5-inch diameter pulley, metric threads, and single-groove pulley setups. Other listed applications include Buick Riviera and Oldsmobile Toronado with compressor switch or without switch configurations, plus Cadillac DeVille, Chevrolet Celebrity, and Oldsmobile Cutlass Ciera.

This part number, 1901N, is a fitment-specific A/C compressor kit for 1982-1985 GM vehicles that need a replacement compressor and related service components in one application-matched package.

Common Repair Uses

• Restoring cooling performance after compressor failure
• Addressing noisy or seized R4 compressor operation
• Repairing an A/C system that has been opened for component replacement
• Replacing worn compressor-related parts on select Buick, Cadillac, Chevrolet, and Oldsmobile models
• Servicing vehicles with R4 compressor, switch, pulley, and thread-specific configurations

Installation Notes and Tips

Verify the vehicle’s compressor style, pulley diameter, groove count, and thread configuration before ordering. Match the application notes exactly for Buick Century, Buick LeSabre, Buick Riviera, and Oldsmobile Toronado listings, since the fitment details vary by compressor switch and pulley setup. Flush the system and replace contaminated refrigerant oil as part of the repair process when the system has suffered compressor damage.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with application-specific compressor coverage for GM R4 systems. Part number 1901N is cataloged as a PAC-Kit with new compressor for the listed vehicle applications.