Four Seasons 3697R A/C Compressor and Component Kit - Front and Rear

Four Seasons PAC-Kit w/ Reman Compressor 3697R

Four Seasons 3697R is an A/C compressor kit for select GM, Chevrolet, GMC, Saab, and Isuzu SUVs equipped with a TRSA12 compressor. This PAC-Kit w/ Reman Compressor supports front and rear HVAC applications and is built for direct replacement service on the listed vehicles.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for A/C service
• Fits vehicles with TRSA12 compressor systems
• Front and rear HVAC application coverage
• Includes reman compressor application reference 77561
• Part number 3697R for catalog and search identification

Vehicle Fitment

• Fits 2003-2009 Chevrolet Trailblazer, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2003-2006 Chevrolet Trailblazer EXT, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2003-2009 GMC Envoy, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2003-2006 GMC Envoy XL, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2004-2005 GMC Envoy XUV, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2003-2008 Isuzu Ascender, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor
• Fits 2005-2009 Saab 9-7x, front and rear; w/ TRSA12 Compressor; 77561 (Reman Compressor), 83222 (Accum), 38887 (Orifice), 39011 (Exp Valve), 69991 (Flush Qty.2), 59007 (Oil Qty.2); PAC-Kit w/ Reman Compressor

Common A/C Problems This Kit Addresses

• Loss of compressor output in TRSA12-equipped systems
• Weak cabin cooling in Chevrolet Trailblazer and GMC Envoy platforms
• Compressor-related noise or seizure in front and rear HVAC systems
• Restricted refrigerant flow caused by worn system components
• Service replacement needs on Saab 9-7x and Isuzu Ascender A/C systems

Installation Notes

Verify the vehicle uses a TRSA12 compressor before ordering. Match the listed fitment exactly for Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, Isuzu Ascender, Trailblazer EXT, Envoy XL, and Envoy XUV applications. Follow standard A/C service procedures, including system evacuation, flushing, and oil management, and confirm all related components are in serviceable condition before recharging.

Quality Assurance

Four Seasons is a recognized aftermarket source for climate control components, and this PAC-Kit is cataloged for the specified OE-style applications. Part number 3697R helps ensure accurate identification for 2003-2009 Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, and related platform vehicles.