Keep warm air flowing to the rear seats with the Agility Autoparts HVAC Heater Core (MPN 9010398) — a direct-fit rear Trailblazer heater core replacement for the 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, and 2004-2007 Buick Rainier. The heater core circulates hot engine coolant through its tubes and fins so the blower can push warmed air into the rear cabin; when it corrodes or springs a leak, you may notice weak or no heat from the rear vents, a sweet coolant smell, fogged glass, or dropping coolant.
Country of origin: China.
Interchange: 18-12358
1812358 · 89023339 · 99097 · 92282 · 99276
This part cross-references / interchanges with the following part numbers:
Does this fit a 2004 Trailblazer heater core?
Yes. It's a direct-fit replacement for the 2002-2009 Chevrolet Trailblazer, including the 2004 model year, plus the 2002-2009 GMC Envoy and 2004-2007 Buick Rainier.
Is this a front or rear heater core?
This is the rear heater core for the listed applications, feeding warm air to the rear cabin.
What is this heater core made of?
It uses an aluminum core and aluminum tank, built with fin-and-tube technology for thermal performance and corrosion resistance.
What are signs my heater core may need replacing?
Common signs include weak or no heat from the rear vents, a sweet coolant odor, fogging inside the glass, or unexplained coolant loss. Diagnose the cause before replacing.
Is it ready to install out of the box?
Yes. Each unit is fitment-checked in the vehicle's HVAC heater module for a drop-in fit and is 100% leak tested before shipping.
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.
