One Stop Solutions 99130 HVAC Heater Core - Rear

OE-Style Rear Heater Core

Restore rear cabin heat with this OSC Premium new heater core from One Stop Solutions. Part number 99130 is built for original equipment form and function, with aluminum construction and pressure testing for dependable HVAC service.

• Premium aluminum heater core construction
• Cadmium-plated tubes inside and out to resist premature failure
• Individually pressure tested before release
• Includes necessary foam and accessories
• Direct replacement for copper-designed heater cores

Vehicle Fitment

• Fits 2008-2017 Buick Enclave, rear
• Fits 2009-2017 Chevrolet Traverse, rear
• Fits 2014-2016 Cadillac Escalade, N/A
• Fits 2015-2016 Chevrolet Tahoe, N/A
• Fits 2007-2016 GMC Acadia, rear
• Fits 2007-2015 GMC Yukon, rear
• Fits 2007-2014 Chevrolet Silverado 2500 HD, rear
• Fits 2007-2014 Chevrolet Silverado 3500 HD, N/A, w/o Aux Temp Controls
• Fits 2007-2014 Chevrolet Suburban 1500, rear
• Fits 2007-2014 Chevrolet Tahoe, rear
• Fits 2007-2014 GMC Sierra 2500 HD, rear
• Fits 2007-2014 GMC Sierra 3500 HD, rear
• Fits 2007-2014 GMC Yukon XL 1500, rear
• Fits 2007-2013 Cadillac Escalade, rear
• Fits 2007-2013 Chevrolet Silverado 1500, rear
• Fits 2007-2013 Chevrolet Suburban 2500, rear
• Fits 2007-2013 GMC Sierra 1500, rear
• Fits 2007-2010 Saturn Outlook, rear
• Fits 2007-2009 Cadillac Escalade EXT, rear

Detailed Description

OSC 99130 is a rear HVAC heater core engineered as a direct replacement for OE-style applications across Buick Enclave, Chevrolet Traverse, GMC Acadia, GMC Yukon, and related GM trucks and SUVs. It is designed for vehicles that use a rear heater core assembly, including select Chevrolet Silverado, Sierra, Suburban, Tahoe, and Cadillac Escalade models. This part cross-references APDI 9010555 and Spectra Premium 99379 for the same application.

Common Repair Symptoms

• Weak or no rear heat output
• Coolant odor inside the cabin
• Fogging or dampness from a leaking heater core
• Uneven HVAC performance between front and rear zones
• Cooling system coolant loss traced to the heater core

Installation Notes

Verify rear HVAC configuration before ordering, especially on 2007-2014 Chevrolet Silverado 3500 HD applications listed without auxiliary temperature controls. Confirm the vehicle’s year, make, model, and rear heater core layout against the original unit before installation. Replace any damaged foam seals during service and inspect the cooling system for contamination or leaks that could affect the new core.

Quality Assurance

Each heater core is individually pressure tested, and the aluminum tubes are cadmium plated inside and out to help reduce premature failure. The unit is built to OE form and function for direct replacement service.