Four Seasons 30112SK A/C Compressor Replacement Service Kit

Four Seasons A/C Installer Kit for HD GM Trucks

The Four Seasons 30112SK A/C Installer Kit is built for R134a service on select Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD applications. It combines the core replacement parts needed during compressor service, including an accumulator, orifice tube, compressor oil, O-ring/gasket pack, and cap and valve kit.

Four Seasons A/C Installer Kits are organized for compressor replacement service on vehicles that use an orifice tube expansion device and PAG 46 oil. This kit is a direct fit for select 2007-2010 GM heavy-duty trucks and includes the service components commonly replaced when restoring A/C system operation.

Key Features

• Part number 30112SK from Four Seasons A/C Installer Kits
• Includes accumulator, orifice tube, compressor oil, O-ring/gasket pack, and cap and valve kit
• Uses PAG Oil / 46 and R134a refrigerant
• Orifice tube specification: 0.072 in., gray porous style
• Accumulator dimensions: 3.500 in. diameter and 8.250 in. length
• P-Nut inlet and outlet fittings on the accumulator
• Gaskets and seals included
• Limited lifetime warranty

Detailed Description

The Four Seasons 30112SK A/C Compressor Replacement Service Kit is a service-focused solution for GM HD truck HVAC repairs. It is specified for 2010 Chevrolet Silverado 2500 HD and Silverado 3500 HD, 2010 GMC Sierra 2500 HD and Sierra 3500 HD, plus 2007-2009 Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and 2007 Chevrolet Silverado 2500 HD Classic, Silverado 3500 Classic, and 2007-2010 GMC Sierra 3500 HD, with notes for vehicles without the ambulance package where listed. The kit is built around the correct compressor oil type, expansion device style, and sealing components needed for R134a systems.

This part cross-references Monroe Shocks & Struts (e.g., 551170, MUK30014) for the same application.

Common Service Issues

• Loss of cooling after compressor replacement
• Contaminated or incorrect A/C oil during system repair
• Restricted refrigerant flow through the orifice tube
• Leaking seals or O-rings at service connections
• Accumulator wear in R134a truck A/C systems

Installation Notes and Tips

Verify the vehicle’s refrigerant type, compressor oil specification, and accumulator fitting style before installation. Replace the orifice tube and sealing components during compressor service, and evacuate and recharge the system according to factory procedures after repairs. Confirm fitment notes for ambulance-package exclusions where applicable.

Quality Assurance

Four Seasons backs this A/C service kit with a limited lifetime warranty. The kit is assembled for the specified GM truck applications and uses the listed service components for compressor replacement work.