Four Seasons 3908R A/C Compressor and Component Kit - Front

Four Seasons PAC-Kit w/ Reman Compressor 3908R

Four Seasons 3908R is a PAC-Kit A/C compressor kit for front HVAC service on select GM and Saab applications with rear A/C. It is built around a remanufactured TRSA12 compressor and matches the listed vehicle-specific service components for a focused repair on the air conditioning system.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for front A/C service
• Remanufactured TRSA12 compressor application
• Fits vehicles with rear A/C configurations listed below
• Vehicle-specific kit reference: 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 69991 (Flush), 59007 (Oil)
• Part number 3908R for ordering and catalog lookup

Fitment Details

• Fits 2003-2009 Chevrolet Trailblazer, front, w/ TRSA12 Compressor; w/ Rear AC
• Fits 2003-2009 GMC Envoy, front, w/ TRSA12 Compressor; w/ Rear AC
• Fits 2005-2009 Saab 9-7x, front, w/ TRSA12 Compressor; w/ Rear AC
• Fits 2003-2006 Chevrolet Trailblazer EXT, front, w/ TRSA12 Compressor; w/ Rear AC
• Fits 2003-2006 GMC Envoy XL, front, w/ TRSA12 Compressor; w/ Rear AC
• Fits 2004-2005 GMC Envoy XUV, front, w/ TRSA12 Compressor; w/ Rear AC

What It Is Used For

• Replacing a worn or failed A/C compressor on Chevrolet Trailblazer and GMC Envoy models
• Restoring cooling performance in Saab 9-7x vehicles with rear A/C
• Addressing compressor noise, seizure, or loss of refrigerant circulation
• Supporting repair of weak cabin cooling or inconsistent vent temperatures
• Servicing front HVAC compressor applications that use the TRSA12 design

Installation Notes

Verify compressor type, rear A/C configuration, and vehicle application before installation. Follow proper A/C service procedures, including system evacuation, flushing where required, and correct oil handling for the listed application. Confirm all related components match the vehicle’s service requirements before charging the system.

Quality Assurance

Four Seasons supplies this PAC-Kit as a reman compressor-based service solution for the specified GM and Saab platforms. Part number 3908R is cataloged for direct application matching on the listed Trailblazer, Envoy, and 9-7x vehicles.