Four Seasons 92404 HVAC Heater Core - Rear

Reliable Heater Core Replacement for Buick, Chevrolet, and GMC

The Four Seasons Heater Core 92404 is designed to restore efficient heating performance in select Buick, Chevrolet, and GMC models. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation for your Envoy, Trailblazer, and Rainier vehicles.

• Core dimensions: 7-1/4 inches length, 4-1/4 inches width, 1 inch thickness
• Constructed from corrosion-resistant aluminum material
• Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet
• Meets or exceeds OEM specifications for reliable fit and function
• Compatible with Buick Envoy, Envoy XL, Envoy XUV, Chevrolet Trailblazer, Trailblazer EXT, and GMC Rainier

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core line focuses on providing high-quality HVAC components that meet or exceed original equipment manufacturer standards. This aluminum heater core model 92404 is part of that line, offering a balance of durability and efficient heat exchange designed specifically for certain GM SUVs. The product line emphasizes precise fitment and reliable performance to maintain vehicle heating systems effectively.

Product Details and Specifications

This heater core features a compact design with a core height of 7.25 inches, width of 4.25 inches, and a depth of 1 inch, making it suitable for the specified GM models. The aluminum core material provides resistance to corrosion and enhances heat transfer efficiency. Both inlet and outlet tubes measure 0.625 inches (15.875 mm) in diameter, ensuring proper coolant flow. The fixed pipe positioning means the heater core is designed for direct replacement without adjustable fittings.

Common Applications and Issues Addressed

• Restores heating performance in Buick Envoy and Envoy XL models
• Resolves insufficient cabin heat in Chevrolet Trailblazer and Trailblazer EXT
• Fixes coolant leaks or blockages in GMC Rainier heating system
• Eliminates heater core corrosion and clogging problems
• Improves overall HVAC system efficiency and comfort

Installation Notes and Tips

When replacing the heater core 92404, ensure the cooling system is properly drained before removal. Verify the core dimensions and tube sizes match the vehicle specifications. Since this model does not feature adjustable pipe positioning, alignment with existing hoses is critical. Inspect surrounding HVAC components for wear or damage during installation to prevent future issues.

Quality Assurance and Warranty

The Four Seasons Heater Core 92404 meets or exceeds OEM standards, providing reliable performance for your vehicle's heating system. Manufactured with corrosion-resistant aluminum, it offers durability and consistent heat transfer. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality controls to ensure customer satisfaction and part longevity.