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

Four Seasons 3908N A/C Compressor Kit

Four Seasons 3908N is a PAC-Kit with a new compressor for front HVAC service on select GM and Saab applications. It is built for vehicles with the TRSA12 compressor setup and rear A/C where noted, making it a direct-fit service option for common compressor replacement jobs.

Key Features

• Brand: Four Seasons
• Brand line: PAC-Kit w/ New Compressor
• Part number: 3908N
• Category: A/C compressor kit
• Front-position HVAC application
• Application-specific fitment for select Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, Isuzu Ascender, Trailblazer EXT, Envoy XL, and Envoy XUV models

Product Details

This Four Seasons PAC-Kit is organized for repair work on the front air conditioning system and is listed for 2003-2009 Chevrolet Trailblazer, 2003-2009 GMC Envoy, 2005-2009 Saab 9-7x, 2003-2008 Isuzu Ascender, 2003-2006 Chevrolet Trailblazer EXT, 2003-2006 GMC Envoy XL, and 2004-2005 GMC Envoy XUV. Fitment notes call out TRSA12 compressor applications and rear A/C on several listings, so matching the vehicle configuration is important before ordering. Part number 3908N is also a useful reference when searching for the correct A/C compressor kit for these platforms.

This part cross-references common service references for the same application, including 78561 and 83222.

What It Helps Address

• Loss of cabin cooling from a worn or failed compressor
• Noisy compressor operation in the front A/C system
• Reduced refrigerant circulation in the HVAC circuit
• Service replacement needs on TRSA12-equipped vehicles
• Repair planning for Trailblazer, Envoy, and 9-7x A/C service

Installation Notes

Verify the compressor type, rear A/C configuration, and model-year fitment before installation. Confirm the vehicle matches the listed front-position application for Four Seasons 3908N, and compare the existing compressor and system layout against the fitment notes for your Chevrolet Trailblazer, GMC Envoy, or Saab 9-7x.

Quality Assurance

Four Seasons PAC-Kit w/ New Compressor products are cataloged as application-specific HVAC service parts for accurate replacement selection. Use the listed fitment details and part number 3908N to confirm the correct match before service.