Four Seasons 4200NK A/C Compressor and Component Kit - Front

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

Four Seasons Complete A/C Kit 4200NK is a complete air conditioning kit with a new compressor for select 2002 GM SUVs. It is built for R134a systems and is listed for front applications on Chevrolet Trailblazer, Trailblazer EXT, GMC Envoy, Envoy XL, and Oldsmobile Bravada with a TRSA12 compressor and no rear A/C.

Key Features

• Complete air conditioning kit with new compressor
• Compressor oil included
• Uses R134a refrigerant
• Includes accumulator, orifice tube, oil, and O-rings
• Orifice tube style: standard, white, 0.072 in. diameter
• Accumulator uses P-nut inlet and outlet fittings
• Limited lifetime warranty

Product Details

Four Seasons 4200NK is a Complete A/C Kit designed around the core service parts needed for a front HVAC repair on select 2002 Chevrolet Trailblazer, Chevrolet Trailblazer EXT, GMC Envoy, GMC Envoy XL, and Oldsmobile Bravada models. The kit includes compressor 78561, accumulator 83045, orifice tube 38623, oil 59007, and O-rings. It is specified for vehicles with a TRSA12 compressor and without rear A/C, and it uses an orifice-tube expansion device for R134a systems.

This Four Seasons Complete A/C Kit line focuses on replacing the major wear items in the air conditioning circuit with matched components. Part number 4200NK is also cross-referenced as 520439 for the same application.

Common Problems This Kit Addresses

• Weak or inconsistent cabin cooling
• Compressor noise or compressor failure
• Restricted refrigerant flow from a worn orifice tube
• Moisture or contamination issues in the A/C system
• Leaks at seals and connection points

Installation Notes and Tips

Verify the vehicle has a TRSA12 compressor and no rear A/C before ordering. This kit is listed for front applications only on the confirmed 2002 fitments. Replace the accumulator, orifice tube, oil, and O-rings during service to support a proper A/C repair, and evacuate and recharge the system with the correct R134a service procedure after installation.

Quality Assurance

Four Seasons backs this Complete A/C Kit 4200NK with a limited lifetime warranty. The kit is built as a complete replacement package for the specified GM SUV applications, including the compressor, accumulator, orifice tube, oil, and sealing components.