Four Seasons 3909N A/C Compressor and Component Kit

Four Seasons PAC-Kit w/ New Compressor 3909N

Four Seasons 3909N is an A/C compressor kit built for specific GM truck applications that use an HT6 compressor. This PAC-Kit w/ New Compressor is listed for Chevrolet C1500, Silverado 1500, Silverado 2500 HD, Silverado 3500, and GMC Sierra 1500, Sierra 2500 HD, and Sierra 3500 models across 1999-2002.

Key Features

• Four Seasons PAC-Kit w/ New Compressor for targeted HVAC service
• Part number 3909N for accurate ordering and fitment lookup
• Application-specific coverage for Chevrolet Silverado 1500 and GMC Sierra 1500 trucks
• Listed for vehicles with HT6 compressor configurations
• Fitment notes include orifice tube diameter and related service components where specified

Product Details

Four Seasons 3909N is a compressor kit package for GM light-duty and heavy-duty trucks that require an HT6 compressor setup. The fitment data shows coverage for 1999-2002 Chevrolet C1500 and Silverado 1500, 2001 Chevrolet Silverado 2500 HD and Silverado 3500, and 1999-2002 GMC Sierra 1500, Sierra 2500 HD, and Sierra 3500. For 2002 Chevrolet C1500, Silverado 1500, and 2001-2002 GMC Sierra 1500, the notes also call out a 13mm orifice tube diameter and black orifice tube configuration. This part number, 3909N, is the reference to use when matching the correct A/C compressor kit for these truck applications.

Common A/C Problems This Part May Address

• Loss of cabin cooling from compressor wear or failure
• Noisy A/C operation tied to a failing compressor
• Inconsistent refrigerant circulation in HT6-equipped systems
• Service issues after replacing related HVAC components on GM trucks
• Restoration of A/C function on Chevrolet Silverado and GMC Sierra platforms

Installation Notes and Tips

Verify the vehicle’s compressor type, orifice tube specification, and model-year listing before ordering. Match the application notes exactly for Chevrolet C1500, Silverado 1500, Silverado 2500 HD, Silverado 3500, and GMC Sierra 1500, Sierra 2500 HD, and Sierra 3500 trucks. Proper A/C service practices should be followed during replacement, including system evacuation, flushing where required, and correct refrigerant oil selection based on the vehicle’s service specifications.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with coverage focused on application-specific A/C service. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.