Four Seasons 2933NK A/C Compressor and Component Kit - Front and Rear

Complete A/C Kit for Trailblazer, Envoy, and More

The Four Seasons Complete A/C Kit 2933NK is a vehicle-specific air conditioning solution built around a new compressor and matched service components. It is configured for R134a systems and includes compressor oil, an accumulator, an orifice tube, an expansion valve, and O-rings for a complete HVAC repair path.

Compatible With 2003-2009 Chevrolet Trailblazer, front and rear; 2003-2009 GMC Envoy, front and rear; 2005-2009 Saab 9-7x, front and rear; and additional GM-platform applications listed below. This kit is built for vehicles using a TRSA12 compressor where specified.

• Four Seasons Complete A/C Kit, part number 2933NK
• Complete air conditioning kit with new compressor
• Refrigerant type: R134a
• Compressor oil included
• Expansion device type: orifice tube
• Kit includes compressor, accumulator, orifice tube, expansion valve, oil, and O-rings
• Limited lifetime warranty

Product Details

Four Seasons 2933NK is part of the Complete A/C Kit line, which packages the major replacement components needed for a full air conditioning service in one application-specific kit. The compressor is paired with the correct accumulator, metering components, and oil specification to support a proper repair on GM SUVs and related platforms. The kit is intended for front and rear HVAC systems where listed and includes the component references shown in the product data.

This part cross-references 520555 and MK1013 for the same application.

Common A/C Problems This Kit Can Address

• Loss of cooling performance from a worn or failed compressor
• Restricted refrigerant flow caused by a clogged or incorrect orifice tube
• Moisture control issues related to a saturated accumulator
• Expansion valve problems affecting refrigerant metering
• Leaks at service connections or sealing points addressed during A/C repair

Installation Notes and Tips

Verify compressor style and system configuration before installation, especially on Trailblazer, Envoy, and Saab 9-7x applications. Confirm the vehicle uses the specified R134a system and TRSA12 compressor where noted. Replace the accumulator, metering components, and O-rings during service, and follow the correct oil handling and evacuation procedures for the system.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. The Complete A/C Kit line is organized to provide the major matched components needed for a proper compressor replacement on the listed Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, Buick Rainier, Isuzu Ascender, and related applications.