Four Seasons 30021SK A/C Compressor Replacement Service Kit

Four Seasons A/C Installer Kit for S10, Sonoma, Blazer

Restore the service-side components needed for an R134a air conditioning repair with the Four Seasons 30021SK A/C Installer Kit. This A/C compressor replacement service kit includes the accumulator, orifice tube, PAG 150 compressor oil, O-ring/gasket pack, and cap and valve kit for a direct-fit service approach on select Chevrolet, GMC, Oldsmobile, and Isuzu applications.

Key Features

• Four Seasons A/C Installer Kits product line
• Includes PAG 150 compressor oil for R134a systems
• Uses a standard white orifice tube with 0.072 in. diameter
• Accumulator measures 3.500 in. diameter and 9.000 in. length
• Female O-ring inlet and male insert O-ring outlet fittings
• Gasket and seal components included
• Limited lifetime warranty
• Part number 30021SK for service and replacement lookup

Product Details

The Four Seasons 30021SK is built as an A/C service kit for compressor replacement work on vehicles using an orifice-tube style HVAC system. It is specified for R134a refrigerant applications and includes the core service parts commonly replaced during A/C repair: accumulator, orifice tube, compressor oil, O-ring/gasket pack, and cap and valve kit. This makes it a practical choice for servicing Chevrolet S10, GMC Sonoma, Chevrolet Blazer, GMC Jimmy, Oldsmobile Bravada, and Isuzu Hombre applications listed in the fitment data. The 30021SK part number is also referenced by 550903, MUK30104, and PK0010 for the same application.

What It Helps Address

• Loss of cooling after compressor replacement
• Contaminated or incorrect compressor oil during A/C service
• Restricted refrigerant flow from a worn orifice tube
• Leaking seals or O-rings in the A/C circuit
• Accumulator-related moisture control and system service needs

Installation Notes

Use this kit on confirmed R134a systems with the specified orifice-tube configuration. Verify accumulator dimensions, fitting style, and oil type before installation. For fitment examples, this kit fits 1996-2004 Chevrolet S10, 1996-2004 GMC Sonoma, and 1996-2005 Chevrolet Blazer; it also fits 1996-2001 Oldsmobile Bravada and 1997-2000 Isuzu Hombre. Additional listed applications include 1994-1995 Chevrolet S10, 1994-1995 GMC Sonoma, 1995 Chevrolet Blazer, 1995 GMC Jimmy, 2000-2002 GMC Jimmy, and 1994 Chevrolet S10 Blazer.

Quality Assurance

Four Seasons backs this A/C Installer Kit with a limited lifetime warranty. The 30021SK is built for service work where the compressor replacement process calls for matched oil, sealing components, and metering-device replacement in one package.