Four Seasons 3173R A/C Compressor Kit - Front

Four Seasons PAC-Kit w/ Reman Compressor 3173R

Four Seasons 3173R is an A/C compressor kit for select GM and Saab applications with rear air conditioning. This PAC-Kit with reman compressor is built for vehicles using a TRSA12B compressor and includes the matched service components called out for the application.

Key Features

• Four Seasons PAC-Kit w/ Reman Compressor for HVAC A/C compressor replacement
• Fits front-mounted applications with TRSA12B compressor setup
• Application-specific coverage for Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x
• Includes remanufactured compressor application 77548 for the listed vehicles
• Part number 3173R for catalog and fitment lookup

Application Details

This Four Seasons PAC-Kit line is organized as a complete application match for vehicles that require a remanufactured compressor and related A/C service parts. For the listed Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x models, the kit is specified for front installation with rear A/C and TRSA12B compressor configuration. Use 3173R when replacing the compressor on the exact vehicle combinations shown below.

• 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 2004-2005 GMC Envoy XUV, front; w/ TRSA12B Compressor; w/ Rear AC

What It Helps Address

• Loss of A/C compressor function on TRSA12B-equipped vehicles
• Front A/C system failure on Chevrolet Trailblazer and GMC Envoy platforms
• Cooling issues in vehicles with rear air conditioning
• Compressor replacement needs tied to remanufactured OE-style service parts
• Fitment matching for Saab 9-7x and related GM applications

Installation Notes

Verify the compressor type, rear A/C configuration, and vehicle year before installation. Match the part to the exact application notes shown for 3173R, and confirm the system is cleaned and inspected before returning the A/C system to service. 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 for the specific vehicle and compressor configuration listed above. Use the application notes to confirm correct fitment before ordering or installation.