Four Seasons 4189NK A/C Compressor and Component Kit - Front and Rear

Complete A/C Kit for GM Minivans

Four Seasons 4189NK is a complete A/C compressor kit for select Chevrolet Uplander, Buick Terraza, Saturn Relay, and Pontiac Montana applications. It combines the major air conditioning service components needed for a front and rear HVAC repair, including a new compressor, filter drier, expansion valves, oil, and O-rings.

This Four Seasons Complete A/C Kit is built for R134a systems and is listed for vehicles using the MSC105CG2 compressor. The kit is organized as a direct replacement solution for common GM minivan A/C service work, with the core parts matched to the application.

Key Features

• Four Seasons Complete A/C Kit, part number 4189NK
• Complete air conditioning kit with new compressor
• Includes compressor oil and O-rings
• R134a refrigerant type
• Block-type expansion device design
• Receiver drier/accumulator with pad mount inlet and outlet fittings
• Limited lifetime warranty

Detailed Description

Four Seasons 4189NK is a Complete A/C Kit designed for front and rear HVAC systems on select 2006-2008 Chevrolet Uplander, 2006-2007 Buick Terraza, 2006-2007 Saturn Relay, and 2006 Pontiac Montana models. It is specified for vehicles with the MSC105CG2 compressor and includes a new compressor, filter drier, two expansion valves, oil, and O-rings. The receiver drier/accumulator measures 1.750 inches in diameter and 10.000 inches in length, with pad mount inlet and outlet fittings.

As a Four Seasons Complete A/C Kit, 4189NK is intended for service repairs where multiple A/C components are being replaced together to restore system operation. The part number 4189NK is a direct reference for this application and is useful when sourcing a complete A/C compressor kit for GM minivan HVAC service.

This part cross-references Four Seasons (e.g., 4189NK) for the same application.

What It Can Help Address

• Loss of cabin cooling in front and rear HVAC zones
• Compressor failure or compressor noise
• Restricted refrigerant flow from a worn expansion valve
• Moisture or contamination in the A/C system after component failure
• Service needs on R134a-equipped GM minivans

Installation Notes and Tips

Verify compressor style and system configuration before installation. This kit is listed for vehicles with the MSC105CG2 compressor and should be matched to the vehicle’s A/C layout, refrigerant type, and connection style. Replace the receiver drier and expansion valves during compressor service, and evacuate and recharge the system according to factory procedures after repairs.

For fitment, this kit fits 2006-2008 Chevrolet Uplander, front and rear; 2006-2007 Buick Terraza, front and rear; 2006-2007 Saturn Relay, front and rear; and 2006 Pontiac Montana, front and rear.

Quality Assurance

Four Seasons 4189NK carries a limited lifetime warranty.