Four Seasons 6550R A/C Compressor Kit

Four Seasons PAC-Kit w/ Reman Compressor 6550R

Four Seasons 6550R is an A/C compressor kit for 1975 Chevrolet C10, C20, C30, K10, and K20 applications equipped with an R4 compressor. This PAC-Kit w/ Reman Compressor is built for direct service on classic Chevrolet truck HVAC systems that use metric-thread compressor connections and a compressor switch.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for A/C compressor replacement
• Fits 1975 Chevrolet C10, C20, C30, K10, and K20
• Application-specific for R4 compressor systems with metric threads
• Configured for vehicles using a compressor switch
• Part number 6550R for catalog and service lookup

Product Details

This Four Seasons 6550R kit is listed for 1975 Chevrolet C10, C20, C30, K10, and K20 trucks with an R4 compressor setup. The PAC-Kit w/ Reman Compressor format supports A/C service on these Chevrolet truck platforms where the compressor, accumulator, orifice, flush, and oil service components are identified in the fitment notes. Four Seasons 6550R is a practical match for technicians and restorers working on vintage Chevrolet HVAC systems that require metric-thread compressor hardware and switch-equipped compressor configurations.

Common A/C Issues It Can Address

• Compressor failure or loss of A/C pumping performance
• Noisy or seized compressor operation
• Inconsistent cabin cooling on 1975 Chevrolet C10, C20, C30, K10, or K20
• Service replacement for R4 compressor-equipped HVAC systems
• Restoration work on classic Chevrolet truck air conditioning systems

Installation Notes and Tips

Verify the vehicle uses an R4 compressor, metric-thread compressor connections, and a compressor switch before ordering. Match the vehicle’s existing HVAC configuration to the fitment notes for 1975 Chevrolet C10, C20, C30, K10, and K20. Follow standard A/C service procedures, including system evacuation, flushing, and correct oil handling, before compressor installation.

Quality Assurance

Four Seasons is a recognized aftermarket brand in HVAC service parts, and part number 6550R is cataloged for the listed Chevrolet truck applications. Confirm all fitment details against the vehicle’s existing compressor setup before installation.