Help keep warm air flowing through the cab with the Agility Auto Parts Heater Core, part number 9010121. This replacement core carries hot engine coolant through its tubes so the blower can move heated air into the cabin. It fits many vehicles, among them the 1969-1972 Chevrolet Blazer, 1967-1972 Chevrolet C10 Pickup and 1967-1972 Chevrolet C10 Suburban. See the "Vehicles it fits" section for engine details and the full list of Chevrolet and GMC applications.
- Thermal performance and corrosion resistance: Agility uses enhanced design features, including the latest fin and tube technology, aimed at increased thermal performance and resistance to corrosion.
- Drop-In Fit: Each certified heater is fitment checked in the actual vehicle's HVAC heater module, so it is ready to install right out of the box.
- OE-level quality: Certified to match or surpass OE specifications.
- Quality systems: Engineered and built under ISO TS16949 quality systems, and 100% leak tested.
Signs that the heater core may need replacing include a sweet coolant smell in the cab, a fogged windshield, damp carpet or weak heat. These symptoms can have other causes, so diagnose the cause first. If a failed heater core is the cause, this part replaces it. Refill the cooling system as directed by the vehicle service information after installation.
Agility Auto Parts is a North American company with distribution warehouses in Canada and the United States.
Interchange: 18-12115
1812115 · 3025322 · 98615 · 399090 · 94615 · 9090 · 90900
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
3025322, 98615, 399090, 18-12115, 94615, 9090, 90900
Frequently Asked Questions
Is this the right Blazer heater core for my 1969-1972 Chevrolet Blazer?
Yes. The 1969-1972 Chevrolet Blazer is one of the listed applications for Agility 9010121. The "Vehicles it fits" section shows every vehicle it fits.
Does it also fit the 1967-1972 Chevrolet C10 Pickup and 1967-1972 Chevrolet C10 Suburban?
Yes. It is listed for the 1967-1972 Chevrolet C10 Pickup and the 1967-1972 Chevrolet C10 Suburban. The "Vehicles it fits" section shows the other Chevrolet and GMC models it fits.
What does an HVAC heater core do?
Hot engine coolant flows through the core's tubes. The blower pushes cabin air across its fins, which lets the heater and defroster supply warm air.
What are the signs a heater core may need replacing?
Common signs include a sweet coolant smell in the cab, a foggy film on the windshield, damp carpet, weak heat or unexplained coolant loss. Diagnose the cause before replacing any parts.
Is the Agility heater core tested before it ships?
Yes. Agility heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.
