Universal Air HT4204C HVAC Heater Core - Front

Heater Core Aluminum for GM Trucks and SUVs

Universal Air HT4204C is an aluminum HVAC heater core for a wide range of Chevrolet, GMC, Cadillac, and Hummer applications. It is built for direct replacement use in vehicles such as the Chevrolet Silverado 1500, GMC Sierra 2500 HD, and Cadillac Escalade, with fitment spanning model years from 1996 through 2018.

Key Features

• Aluminum heater core construction for HVAC heat transfer service
• Direct-fit replacement for many GM truck and SUV platforms
• Compatible with front-position applications where listed
• Fits a broad range of Silverado, Sierra, Tahoe, Yukon, Escalade, and Hummer models
• Part number HT4204C for catalog and service identification

Fitment Coverage

• Fits 2015-2018 Chevrolet Silverado 3500, N/A
• Fits 2012-2013 Chevrolet Silverado 3500, N/A
• Fits 2001-2010 Chevrolet Silverado 3500, N/A
• Fits 2001-2014 Chevrolet Silverado 2500 HD, N/A
• Fits 1999-2013 Chevrolet Silverado 1500, N/A
• Fits 2007-2014 Chevrolet Silverado 3500 HD, N/A
• Fits 2000-2006 Chevrolet Tahoe, Front
• Fits 2000-2014 GMC Yukon, Front
• Fits 2000-2014 GMC Yukon XL 1500, Front
• Fits 2009-2014 Cadillac Escalade, Front
• Fits 2002-2006 Cadillac Escalade, Front
• Fits 2003-2009 Cadillac Escalade, N/A
• Fits 2003-2014 Cadillac Escalade ESV, Front
• Fits 2003-2009 Hummer H2, N/A

Product Details

Universal Air HT4204C is a heater core aluminum replacement for GM full-size trucks and SUVs that use the listed HVAC core configuration. This part number is commonly searched for Silverado 1500 heater core replacement, GMC Sierra heater core service, and Cadillac Escalade heater core repair. It also covers related applications including Chevrolet Suburban, Avalanche, Yukon XL, and Hummer H1/H2 platforms where specified. This part cross-references 1A Auto (e.g., 1AHC00001) for the same application.

Common Repair Uses

• Loss of cabin heat
• Coolant odor inside the vehicle
• Sweet smell or dampness near the HVAC case
• Fogging from heater core leakage
• Restricted heater performance from a failing core

Installation Notes

Verify year, make, model, and HVAC position before ordering. Heater core replacement typically requires access to the HVAC case and careful handling of coolant lines and interior trim components. Confirm the vehicle’s original core layout against the listed fitment for HT4204C before installation.

Quality Assurance

Universal Air supplies this heater core as an aluminum HVAC replacement component for the listed GM applications. Use the fitment data to confirm compatibility with your Silverado, Sierra, Escalade, Tahoe, Yukon, or related platform before service.