Four Seasons 40031SK A/C Compressor Replacement Service Kit

Four Seasons A/C Installer Kit for GM SUV Applications

The Four Seasons 40031SK A/C Installer Kit bundles the core service components needed when replacing an air conditioning compressor on select GM and related SUV platforms. It includes PAG 46 compressor oil, sealing components, and matched service parts to support a complete R134a A/C repair.

Built for front and rear system service on applications such as Chevrolet Trailblazer, GMC Envoy, and Buick Rainier, this kit helps streamline compressor replacement work with the parts commonly needed during an A/C overhaul. Four Seasons 40031SK is part of the A/C Installer Kits line for organized, application-specific service.

Key Features

• Part number: 40031SK
• A/C compressor replacement service kit for R134a systems
• Includes PAG Oil / 46 compressor oil
• Includes accumulator, orifice tube kit, rear expansion valve, O-ring/gasket pack, and cap and valve kit
• Gaskets and seals included
• Receiver drier/accumulator with 3.500 in diameter and 8.000 in length
• P-nut inlet and outlet fittings, 0.750 in / 19.050 mm
• Limited lifetime warranty

Detailed Description

Four Seasons 40031SK is an A/C compressor replacement service kit for vehicles using R134a refrigerant. The kit is centered around the service parts typically replaced during compressor work, including the accumulator, orifice tube kit, rear expansion valve, compressor oil, O-ring/gasket pack, and cap and valve kit. With PAG 46 oil included, it supports proper reassembly of the air conditioning system after service.

This kit is listed for 2003-2009 Chevrolet Trailblazer, 2003-2009 GMC Envoy, 2005-2009 Saab 9-7x, 2003-2008 Isuzu Ascender, 2004-2007 Buick Rainier, 2003-2006 Chevrolet Trailblazer EXT, 2003-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2004 Oldsmobile Bravada. This part cross-references MUK40001 and PK0069 for the same application.

What This Kit Helps Address

• Compressor replacement service on R134a A/C systems
• Leaking or worn O-rings and gasket seals
• Restricted refrigerant flow through the orifice tube
• Service needs involving the accumulator or rear expansion valve
• System reassembly after A/C component replacement

Installation Notes and Tips

• Verify vehicle fitment by year, make, and model before installation.
• Match the refrigerant type and oil specification to the vehicle system; this kit uses R134a and PAG 46 oil.
• Inspect mating surfaces and replace worn seals during reassembly.
• Confirm accumulator dimensions and P-nut fitting style before service.
• Follow the vehicle service manual for evacuation, charging, and leak testing after installation.

Quality Assurance

Four Seasons backs this A/C service kit with a limited lifetime warranty. The 40031SK is built for direct service use on the listed Chevrolet, GMC, Saab, Isuzu, Buick, and Oldsmobile applications, including Chevrolet Trailblazer and GMC Envoy models.