Keep hot coolant moving through the rear climate system with the Agility Auto Parts Rear HVAC Heater Core (MPN 9010525) — a direct-fit Trailblazer heater core that replaces the rear heater core on the 2002-2009 Chevrolet Trailblazer and its GM siblings. Coolant flows through the aluminum core while blower air passes over the fins to warm the rear cabin; if a leaking, clogged, or corroded core is the cause of weak rear heat, fogged glass, or a sweet coolant smell, this unit replaces it.
Fitment: 2004-2007 Buick Rainier [All]; 2002-2009 Chevrolet Trailblazer [All]; 2002-2006 Chevrolet Trailblazer EXT [All]; 2002-2009 GMC Envoy [All]; 2002-2006 GMC Envoy XL [All]; 2004-2005 GMC Envoy XUV [All]. See the Buyer's Guide tab to confirm your vehicle.
Interchange: 18-12351
1812351 · 8406 · 89023339 · 99087 · 91404 · 92404 · 99377
This part cross-references / interchanges with the following part numbers:
Will this fit my 2004 Trailblazer heater core?
Yes. This rear HVAC heater core is a direct-fit replacement for the 2002-2009 Chevrolet Trailblazer, including 2004 models. Check the Buyer's Guide tab to confirm your exact vehicle.
Does it fit a GMC Envoy heater core application?
Yes. It fits the 2002-2009 GMC Envoy, 2002-2006 GMC Envoy XL, and 2004-2005 GMC Envoy XUV, all engines. Confirm your model and year in the Buyer's Guide.
What is the core made of?
The core and tank are aluminum, using a fin-and-tube design for thermal performance and corrosion resistance.
What are the inlet and outlet connections?
Both the inlet and outlet are 5/8 quick-connect fittings.
Is this a rear or front heater core?
This is a rear HVAC heater core for the listed applications. It circulates coolant so blower air can warm the rear cabin.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
