Global Parts 8231685 HVAC Heater Core - Rear

Rear HVAC Heater Core for GM SUVs

Global Parts 8231685 is a specific-fit rear HVAC heater core built for select Cadillac, Chevrolet, and GMC applications. It transfers heat from the engine cooling system into the cabin, helping restore rear passenger heat in larger SUVs and utility vehicles.

Key Features

• Specific-fit design for direct application matching
• Aluminum construction for efficient heat transfer
• Rear HVAC placement for rear passenger climate control
• Designed for select Cadillac Escalade ESV, Chevrolet Suburban, and GMC Yukon XL models
• Cross-references Four Seasons 92317 and UAC HT400025C for the same application

Product Details

This Global Parts heater core, part number 8231685, is engineered for rear HVAC systems that rely on coolant flow to produce warm air inside the vehicle. It is a direct-fit replacement for select 2007-2020 Cadillac Escalade ESV, 2007-2014 Chevrolet Suburban 1500, 2007-2013 Chevrolet Suburban 2500, 2016-2019 Chevrolet Suburban 3500 HD, 2007-2013 Cadillac Escalade EXT, 2012-2013 GMC Yukon XL 1500, and 2015-2020 GMC Yukon XL rear applications. The aluminum core supports heat exchange performance while maintaining the fit required for these GM platforms. Part number 8231685 is also referenced by Spectra Premium 98146 and other listed interchange numbers.

Common Repair Symptoms

• Weak or no rear cabin heat
• Uneven temperature output between front and rear HVAC zones
• Coolant odor or moisture near the rear HVAC housing
• Restricted heat transfer caused by an aging or leaking heater core
• Loss of rear passenger comfort in Cadillac Escalade ESV, Chevrolet Suburban, or GMC Yukon XL models

Installation Notes

Verify rear HVAC fitment by year, make, model, and position before installation. This is a specific-fit heater core with no adjustable pipe positioning, so the coolant line routing must match the vehicle configuration. Inspect the cooling system, hoses, and HVAC case for contamination or leaks during replacement to help prevent repeat failure.

Quality Assurance

Global Parts supplies this heater core as a direct replacement component for the listed GM rear HVAC applications. The aluminum construction and application-specific design support consistent fitment for the vehicles shown above.