Four Seasons 90764 HVAC Heater Core - Rear

Reliable HVAC Heater Core for Select GM Trucks and SUVs

The Four Seasons Heater Core 90764 is designed to restore efficient heating performance in your vehicle's HVAC system. Engineered with durable aluminum construction, this heater core is compatible with various Cadillac, Chevrolet, and GMC models, ensuring a precise fit and reliable operation.

• Core dimensions: 8-1/4 inches length, 6-1/4 inches width, 1 inch thickness
• Constructed from corrosion-resistant aluminum for durability
• Tube diameter: 0.75 inches (19.05 mm) for optimal coolant flow
• Meets or exceeds OEM specifications for quality assurance
• Designed specifically for select Cadillac, Chevrolet, and GMC trucks and SUVs

Four Seasons Heater Core Product Line Overview

The Four Seasons Heater Core line focuses on delivering reliable heating components that meet or exceed original equipment manufacturer standards. The 90764 model exemplifies this commitment by providing a robust aluminum core designed to withstand the demands of daily driving while maintaining efficient heat transfer within the HVAC system.

Detailed Product Description and Specifications

This HVAC heater core features an aluminum core measuring 8.25 inches in height, 6.25 inches in width, and 1 inch in depth, providing a compact yet effective heat exchanger. The dual 0.75-inch tubes facilitate consistent coolant flow, ensuring rapid cabin heating. The fixed pipe positioning maintains system integrity without the need for adjustments during installation. This heater core is engineered to fit a range of GM vehicles, including the Chevrolet Blazer, C1500 and C2500 Suburban, Tahoe, as well as the GMC Yukon and Yukon XL models, plus Cadillac Escalade.

Common Applications and Issues Addressed

• Restores heating performance in HVAC systems with leaking or clogged heater cores
• Eliminates coolant leaks inside the passenger compartment
• Prevents engine overheating caused by compromised heater cores
• Resolves insufficient cabin heat during cold weather conditions
• Replaces corroded or damaged aluminum heater cores in GM trucks and SUVs

Installation Notes and Tips

Installation of the Four Seasons Heater Core 90764 requires draining the vehicle’s cooling system and careful removal of the dashboard or HVAC housing to access the core. Ensure all connections are secure and free of debris before reassembly. Since the pipe positioning is fixed, verify compatibility with your specific vehicle model prior to installation to avoid fitment issues.

Quality Assurance and Warranty Information

The Four Seasons Heater Core 90764 meets or exceeds OEM standards, providing reliable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to last under normal operating conditions. Please refer to Four Seasons’ warranty policy for specific coverage details.