Four Seasons 6504R A/C Compressor Kit - Front and Rear

Four Seasons 6504R PAC-Kit Overview

Four Seasons 6504R is a PAC-Kit with reman compressor for classic Chevrolet and GMC truck HVAC systems. It is built for 1970-1972 applications that use an A6 compressor and the listed pulley, thread, and switch configurations.

The Four Seasons PAC-Kit line bundles the compressor-focused service components needed for a targeted A/C repair on older vehicle platforms. This kit is listed for Chevrolet Blazer, C10 Suburban, C20 Suburban, K10 Suburban, K20 Suburban, and GMC Jimmy applications.

Key Features

• Part number 6504R remanufactured A/C compressor kit
• For HVAC systems in 1970-1972 Chevrolet and GMC trucks and SUVs
• Fits A6 compressor applications with a 5-inch or 5.12-inch pulley, depending on vehicle
• Listed for metric-thread compressor connections
• Application notes include compressor switch and OE-style service component references
• Compatible with front and rear HVAC positions as listed

Detailed Description

Four Seasons 6504R is an A/C compressor kit for classic Chevrolet and GMC platforms that require an A6 compressor setup. Fitment includes 1970 GMC Jimmy and 1971-1972 Chevrolet Blazer, C10 Suburban, C20 Suburban, K10 Suburban, K20 Suburban, plus 1971-1972 GMC Jimmy. The application notes call out pulley diameter, metric threads, and compressor switch requirements, making this a fitment-specific solution for restoration and repair work. If you are sourcing a Four Seasons 6504R compressor kit for a Chevrolet Blazer or GMC Jimmy, verify the listed compressor configuration before ordering.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Loss of cabin cooling from compressor wear or failure
• Noisy or inefficient A/C compressor operation
• Incorrect compressor configuration on A6-equipped systems
• Fitment issues tied to pulley diameter or metric-thread connections
• Restoration needs for classic Chevrolet and GMC HVAC systems

Installation Notes and Tips

Confirm the vehicle’s compressor style, pulley diameter, thread type, and switch setup against the fitment notes before installation. This kit is listed for front and rear HVAC positions, so match the application exactly to the vehicle configuration. For best results, inspect the rest of the A/C system for contamination or wear before installing the compressor.

Quality Assurance

Four Seasons reman compressor kits are cataloged for specific OE-style applications and vehicle configurations. Use the listed fitment details for 1970-1972 Chevrolet and GMC models to confirm application accuracy before service.