One Stop Solutions 98539 HVAC Heater Core

OE-Style Heater Core Replacement

Restore cabin heat with this OSC Premium new HVAC heater core from One Stop Solutions. Part number 98539 is built for direct replacement use in select classic GM applications, including Buick Skylark, Chevrolet Malibu, Oldsmobile Cutlass, Pontiac GTO, Pontiac LeMans, Pontiac Tempest, Pontiac Grand Prix, Chevrolet Bel Air, and Chevrolet Impala models with air conditioning.

Designed around original equipment form and function, 98539 uses premium aluminum construction and is built for a drop-in fit in the listed vehicles.

Key Features

• Drop-in fit, form, and function for OE-style replacement
• Premium grade aluminum construction for added durability
• Cadmium-plated tubes inside and out to help resist premature failure
• Individually pressure tested before release
• Includes necessary foam and accessories for the unit
• Built to address original design failures and extend service life in high-mileage vehicles
• Uses cycle, vibration, burst, and environmental testing methods

Detailed Description

The One Stop Solutions 98539 heater core is a premium new HVAC heater core engineered as a direct replacement for copper-designed originals. It is made from aluminum and built to match OE form and function, making it a practical choice for classic GM heating system service. This part cross-references 94539 and 399047 for the same application. For buyers searching for a heater core for 1964-1967 Buick Skylark with air conditioning, a heater core for 1965-1967 Chevrolet Malibu with air conditioning, or a heater core for 1964-1967 Pontiac GTO with air conditioning, 98539 matches the listed applications.

What It Helps Solve

• Restricted or weak cabin heat output
• Coolant leakage from a failing heater core
• Corrosion-related failure in older copper-style units
• Fitment issues caused by worn or incorrect replacement parts
• Reduced service life in high-mileage vehicles

Installation Notes and Tips

• Verify the vehicle is equipped with air conditioning before ordering.
• Confirm the original part number and heater core dimensions against the removed unit.
• Inspect hoses, clamps, and the HVAC case during replacement to avoid repeat labor.
• Flush the cooling system before installing the new heater core.
• Check for leaks and proper heater operation after installation.

Quality Assurance

Each heater core is individually pressure tested and built using premium materials for consistent performance. OSC applies cycle, vibration, burst, and environmental testing to help validate durability in service.