Four Seasons 6540R A/C Compressor Kit

Four Seasons 6540R PAC-Kit w/ Reman Compressor

Four Seasons 6540R is a PAC-Kit with reman compressor for 1975 Chevrolet C10, C20, C30, K10, and K20 applications using an A6 compressor setup. It is listed for vehicles with a 5.12-inch diameter pulley, metric threads, and a single-groove pulley.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor
• Part number 6540R
• For 1975 Chevrolet C10, C20, C30, K10, and K20
• Configured for A6 compressor applications
• Requires 5.12-inch diameter pulley, metric threads, and single-groove pulley
• Includes fitment notes for related A/C service components: 57098 reman compressor, 33204 accumulator, 38628 orifice, 69991 flush, and 59003 oil

Detailed Description

This Four Seasons A/C compressor kit is built for classic 1975 Chevrolet truck platforms, including C10, C20, C30, K10, and K20 models. The 6540R PAC-Kit w/ Reman Compressor is specified for A6 compressor systems and matches the listed pulley and thread configuration, making it a direct-match option for restoration or HVAC service work on these Chevrolet applications. Four Seasons 6540R is a practical choice when replacing a worn compressor in a truck that uses the original-style A/C layout.

Common Problems It Can Address

• Loss of cabin cooling from a worn or failed A/C compressor
• Noisy compressor operation in a 1975 Chevrolet C10, C20, C30, K10, or K20
• Incorrect pulley or thread configuration during compressor replacement
• Restoration work on original A6-based Chevrolet truck A/C systems
• Service replacement for aging compressor assemblies in classic GM truck HVAC systems

Installation Notes and Tips

Verify the vehicle uses an A6 compressor with a 5.12-inch diameter pulley, metric threads, and a single-groove pulley before ordering. Match the existing A/C system components and service specifications to the fitment notes for the best installation result. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with coverage for classic vehicle air conditioning service. Part number 6540R is cataloged for the listed Chevrolet truck applications and configuration details.