Four Seasons 92030 HVAC Heater Core - Rear

Rear Heater Core for GM SUVs

Four Seasons 92030 is an aluminum HVAC heater core built for rear heat service in select Cadillac, Chevrolet, and GMC applications. It is an OE-style replacement that meets or exceeds OEM requirements and uses a compact aluminum core design for the specified rear HVAC layout.

Key Features

• Aluminum heater core construction
• Core dimensions: 5-3/8 in. height, 6 in. width, 1 5/8 in. thickness
• Tube size: 0.750 in. / 19.050 mm on both connections
• Meets or exceeds OEM specifications
• Rear HVAC heater core application
• Four Seasons Heater Core line, part number 92030

Product Details

The Four Seasons Heater Core line focuses on direct-fit HVAC replacement components for heating system service. This Four Seasons 92030 heater core uses aluminum core material and fixed pipe positioning, with a compact footprint that matches the rear heater core requirements listed for the vehicle applications below. It is a practical replacement for restoring cabin heat performance in Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon rear HVAC systems.

This part cross-references Dorman - HELP 91030 for the same application.

Vehicle Fitment

• Fits 2002-2006 Cadillac Escalade, Rear Heater Core
• Fits 2001-2006 Chevrolet Tahoe, Rear Heater Core
• Fits 2001-2006 GMC Yukon, Rear Heater Core
• Fits 2002 Cadillac Escalade EXT, Rear Heater Core
• Fits 2000 Chevrolet Tahoe, Rear Heater Core; New Body Style; Heater Core

Common Repair Symptoms

• Weak or inconsistent rear cabin heat
• Coolant odor inside the vehicle
• Fogging or film on interior glass from HVAC leakage
• Coolant loss traced to the rear heater core circuit
• Restricted heat output in Cadillac Escalade, Chevrolet Tahoe, or GMC Yukon rear HVAC systems

Installation Notes

Verify the rear HVAC configuration, tube size, and core dimensions before installation. Compare the original heater core to the Four Seasons 92030 to confirm pipe orientation and case fitment. Flush the cooling system and inspect hoses, clamps, and related HVAC components during replacement to help prevent repeat contamination or flow restriction.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements. The aluminum construction and application-specific sizing support a direct replacement approach for rear heater core service in the listed Cadillac, Chevrolet, and GMC models.