Four Seasons 3173N A/C Compressor Kit - Front

Four Seasons PAC-Kit w/ New Compressor 3173N

Four Seasons 3173N is a PAC-Kit with a new compressor for select GM, Chevrolet, Saab, and Isuzu SUVs equipped with rear A/C. It is built for front-position applications that use a TRSA12B compressor, with one 2003 fitment listed for the TRSA09K compressor.

Key Features

• Four Seasons PAC-Kit w/ New Compressor
• Part number 3173N
• Front A/C compressor kit for select rear-A/C vehicles
• Applications listed with TRSA12B compressor, plus one 2003 TRSA09K fitment
• Includes compressor-related service components listed in the fitment notes

Vehicle Fitment

• Fits 2006-2009 Chevrolet Trailblazer, front, w/ TRSA12B Compressor; w/ Rear AC.
• Fits 2005-2009 GMC Envoy, front, w/ TRSA12B Compressor; w/ Rear AC.
• Fits 2005-2009 Saab 9-7x, front, w/ TRSA12B Compressor; w/ Rear AC.
• Fits 2003-2006 Chevrolet Trailblazer EXT, front, w/ TRSA12B Compressor; w/ Rear AC.
• Fits 2003-2006 GMC Envoy XL, front, w/ TRSA12B Compressor; w/ Rear AC.
• Fits 2003-2006 Isuzu Ascender, front.
• Fits 2004-2005 GMC Envoy XUV, front, w/ TRSA12B Compressor; w/ Rear AC; 78548 (New Compressor), 83222 (Accum), 38887 (Orifice), 69991 (Flush), 59007 (Oil).
• Fits 2003 Chevrolet Trailblazer EXT, front, w/ TRSA09K Compressor; w/ Rear AC; 78548 (New Compressor), 83222 (Accum), 38887 (Orifice), 69991 (Flush), 59007 (Oil).
• Fits 2003 GMC Envoy XL, front, w/ TRSA09K Compressor; w/ Rear AC; 78548 (New Compressor), 83222 (Accum), 38887 (Orifice), 69991 (Flush), 59007 (Oil).

What It Helps Address

• Weak or inconsistent cabin cooling
• Compressor noise or compressor failure
• Loss of A/C performance in rear-A/C SUVs
• System contamination concerns after compressor replacement
• Service needs on vehicles using the specified TRSA compressor configurations

Installation Notes and Tips

Verify the compressor style before ordering: most listed applications use a TRSA12B compressor, while the 2003 Chevrolet Trailblazer EXT and 2003 GMC Envoy XL are listed with a TRSA09K compressor. Confirm front-position fitment and rear-A/C configuration against the vehicle’s existing system before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive A/C repair, and this PAC-Kit is cataloged as a new-compressor kit for the listed applications.