Four Seasons 4921N A/C Compressor and Component Kit

Four Seasons PAC-Kit w/ New Compressor 4921N

Four Seasons 4921N is an A/C compressor kit for select 2002 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 applications. This PAC-Kit w/ New Compressor is built for vehicles using an HT6 compressor and the specified 13mm orifice tube setup.

Key Features

• Brand: Four Seasons
• Brand line: PAC-Kit w/ New Compressor
• Part number: 4921N
• Category: HVAC A/C clutch and compressor
• Application-specific fitment for 2002 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500
• Notes call for HT6 compressor, 13mm orifice tube diameter, and black orifice tube

Product Details

Four Seasons 4921N is a compressor kit for HVAC service on select GM heavy-duty trucks. It is listed for 2002 Chevrolet Silverado 2500 HD and Silverado 3500, plus 2002 GMC Sierra 2500 HD and Sierra 3500, with fitment notes that specify HT6 compressor applications and the matching 13mm black orifice tube configuration. The PAC-Kit w/ New Compressor line groups the compressor service application under one part number for direct vehicle matching.

This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Loss of A/C compressor function
• Weak or inconsistent cabin cooling
• Noisy compressor operation
• HVAC performance issues tied to the listed compressor configuration
• Service replacement needs on 2002 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500

Installation Notes

Verify the vehicle uses the listed HT6 compressor and 13mm orifice tube diameter before ordering. Match the black orifice tube note and confirm the application details against the vehicle’s HVAC system. For best results, follow factory service procedures and evacuate, recharge, and test the system after installation.

Quality Assurance

Four Seasons is a recognized HVAC parts brand, and the PAC-Kit w/ New Compressor line is organized for application-specific replacement selection. Part number 4921N should be matched to the exact fitment notes shown for 2002 Chevrolet Silverado and GMC Sierra heavy-duty models.