Four Seasons 3194NK A/C Compressor and Component Kit - Front and Rear

Complete A/C Kit for Trailblazer, Envoy, and 9-7x

Restore cabin cooling with the Four Seasons Complete A/C Kit, part number 3194NK. This complete air conditioning kit includes a new compressor, accumulator, orifice tube, expansion valve, compressor oil, and O-rings for a direct repair on select Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, and related applications.

Built for R134a systems, Four Seasons 3194NK is a complete A/C compressor kit that addresses multiple wear points in one service. It is a fitment-based solution for front and rear HVAC systems using the TRSA12B compressor configuration on the listed vehicles.

Key Features

• Complete A/C kit with new compressor
• Includes compressor oil and O-rings
• Uses R134a refrigerant systems
• Orifice tube style: standard, yellow/white
• Expansion device type: orifice tubes
• Accumulator with P-nut inlet and outlet fittings
• Limited lifetime warranty
• Four Seasons 3194NK / interchange 520645

Product Details

The Four Seasons Complete A/C Kit line is built for full-system service rather than a single-component repair. Part number 3194NK includes the 78548 new compressor, 83222 accumulator, 38887 orifice tube, 39011 expansion valve, 59007 oil, and O-rings. The kit is specified for R134a air conditioning systems and is listed for front and rear HVAC applications on the supported vehicles.

This part cross-references 520645 for the same application. Use Four Seasons 3194NK when replacing a worn compressor and related A/C service components on the Chevrolet Trailblazer, GMC Envoy, or Saab 9-7x platform.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Noisy or failing A/C compressor operation
• Restricted refrigerant flow from a worn orifice tube
• Moisture or contamination issues in the A/C system
• Loss of cooling performance after compressor failure

Installation Notes

Verify compressor type TRSA12B before ordering. Confirm the vehicle uses an R134a system and match the accumulator fitting style, orifice tube specification, and expansion valve configuration to the original setup. Replace the receiver drier/accumulator and related sealing components during service, then evacuate and recharge the system according to factory procedures.

• Fits 2006-2009 Chevrolet Trailblazer, front and rear
• Fits 2005-2009 GMC Envoy, front and rear
• Fits 2005-2009 Saab 9-7x, front and rear
• Fits 2004-2006 Chevrolet Trailblazer EXT, front and rear
• Fits 2004-2006 GMC Envoy XL, front and rear
• Fits 2003-2006 Isuzu Ascender, front and rear
• Fits 2004-2005 GMC Envoy XUV, front and rear
• Fits 2003 Chevrolet Trailblazer EXT, front and rear
• Fits 2003 GMC Envoy XL, front and rear

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. Part number 3194NK is engineered as a complete A/C compressor kit for the listed applications, helping streamline a full air conditioning repair with matched service components.