Four Seasons 1821N A/C Compressor and Component Kit - Front

Four Seasons 1821N PAC-Kit w/ New Compressor

Restore cabin cooling performance with the Four Seasons PAC-Kit w/ New Compressor, part number 1821N. This A/C compressor kit is built for direct-fit service on select GM full-size SUVs and trucks, including Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon applications.

Key Features

• Four Seasons PAC-Kit w/ New Compressor for HVAC A/C compressor replacement
• Part number 1821N for fitment-based lookup and ordering
• Application-specific coverage for 2006-2010 Cadillac, Chevrolet, and GMC vehicles
• Fits front or N/A positions depending on vehicle configuration
• Used on systems with 10S17F and 10S20F compressor setups
• Includes fitment references for rear A/C and non-rear A/C configurations where listed

Detailed Description

The Four Seasons 1821N PAC-Kit w/ New Compressor is listed for a wide range of GM trucks and SUVs from 2006-2010. Coverage includes Cadillac Escalade, Escalade ESV, and Escalade EXT; Chevrolet Avalanche, Silverado, Suburban, and Tahoe; plus GMC Sierra and Yukon models. Fitment varies by year and system configuration, so matching the compressor type, rear A/C setup, and position is important before ordering.

This part number is a practical search match for buyers looking for a 2006-2010 Cadillac Escalade A/C compressor kit, a 2007-2009 Chevrolet Silverado 1500 compressor replacement, or a 2008-2009 GMC Yukon front A/C compressor kit. The PAC-Kit line from Four Seasons groups the compressor with related service components listed in the fitment notes for the specific application.

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

What It Is Used For

• Replacing a failed A/C compressor on GM full-size SUVs and trucks
• Addressing loss of cooling output in Cadillac Escalade and Chevrolet Tahoe systems
• Repairing noisy, seized, or inefficient compressor operation
• Restoring proper refrigerant circulation in Silverado, Sierra, and Yukon HVAC systems
• Servicing vehicles with rear A/C or non-rear A/C configurations listed in the fitment data

Installation Notes and Tips

Verify the compressor style shown in the fitment notes before installation, including 10S17F or 10S20F configuration, rear A/C presence, and front or N/A position. Confirm the vehicle year, make, and model against the fitment list for the exact application. For best results, follow standard A/C service procedures, including system evacuation, flushing where required, and correct oil handling based on the vehicle specification.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with application-specific catalog coverage for GM A/C service. Part number 1821N is cataloged for direct vehicle matching across the listed Cadillac, Chevrolet, and GMC applications.