Four Seasons 3965R A/C Compressor and Component Kit - Front
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Four Seasons
 PAC-Kit w/ Reman Compressor

Four Seasons 3965R A/C Compressor and Component Kit - Front

Brand Four Seasons 3965R
Position Front
Product line PAC-Kit w/ Reman Compressor
Fits Chevrolet and GMC · 21 vehicles

Reman compressor kit. A complete A/C compressor kit for straightforward replacement.

PAC-Kit packaging simplifies sourcing the compressor assembly.

$349.94Free shipping
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Four Seasons 3965R PAC-Kit Overview

Four Seasons 3965R is a PAC-Kit with reman compressor for front A/C systems using an A6 compressor and a 5-inch diameter pulley. It is built for classic Chevrolet and GMC vans and vans from the mid-1970s that need a compressor-focused HVAC service solution.

This Four Seasons PAC-Kit line is organized for targeted A/C repair on older vehicle platforms, combining the remanufactured compressor application with related service components referenced in the fitment notes. Part number 3965R is listed for front-position systems on Chevrolet G10, G20, and G30, plus GMC G15, G25, G35, and G15/G1500, G25/G2500, and G35/G3500 Van applications.

Key Features

  • Four Seasons A/C compressor kit for front HVAC applications
  • Reman compressor configuration for A6 compressor systems
  • Specified for 5-inch diameter pulley setups
  • Fits 1973-1975 Chevrolet and GMC van applications listed below
  • Part number 3965R for catalog and service matching

Vehicle Fitment

  • Fits 1975 Chevrolet G10, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1975 Chevrolet G20, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1975 Chevrolet G30, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1975 GMC G15, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1975 GMC G25, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1975 GMC G35, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1973-1974 GMC G15/G1500 Van, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1973-1974 GMC G25/G2500 Van, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley
  • Fits 1973-1974 GMC G35/G3500 Van, front; w/ A6 Compressor; Compressor w/ 5" Dia. Pulley

What This Part Helps Address

  • Loss of cabin cooling from a worn or failed A/C compressor
  • Noisy compressor operation in front HVAC systems
  • Compressor seizure or reduced refrigerant circulation
  • Fitment issues on A6 compressor systems with a 5-inch pulley
  • Service needs on 1973-1975 Chevrolet and GMC van A/C systems

Installation Notes and Tips

Verify the vehicle uses a front-mounted A6 compressor with a 5-inch diameter pulley before ordering. Match the compressor application to the exact year, make, and model listed in the fitment data, especially on Chevrolet G10, G20, G30 and GMC G15, G25, G35 vans. For best results, inspect the A/C system for contamination and confirm related components are in serviceable condition before installation.

Quality Assurance

Four Seasons is a recognized HVAC parts brand, and this PAC-Kit w/ Reman Compressor is cataloged for specific OE-style applications on classic Chevrolet and GMC vans. Part number 3965R is listed for direct application matching within the stated fitment range.

Related reading

This part fits 21 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1975ChevroletG10——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975ChevroletG20——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975ChevroletG306.6LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975ChevroletG305.7LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975ChevroletG307.4LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975ChevroletG304.8LL6Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975GMCG15——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975GMCG25——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1975GMCG35——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG15/G1500 Van——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG25/G2500 Van——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG35/G3500 Van5.7LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG35/G3500 Van4.1LL6Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG35/G3500 Van4.8LL6Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1974GMCG35/G3500 Van7.4LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG15/G1500 Van——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG25/G2500 Van——Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG35/G3500 Van5.7LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG35/G3500 Van4.1LL6Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG35/G3500 Van5.0LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor
1973GMCG35/G3500 Van7.4LV8Frontw/ A6 Compressor; Compressor w/ 5" Dia. Pulley; 57094 (Reman Compressor), 33211 (Filter Drier), 38683 (Exp Valve), 69991 (Flush), 59003 (Oil); PAC-Kit w/ Reman Compressor