Spectra 99374 HVAC Heater Core - Front

Reliable HVAC Heater Core for Select GM Trucks and SUVs

The Spectra 99374 HVAC heater core is designed to restore efficient heating performance in your Cadillac, Chevrolet, GMC, or Hummer vehicle. Engineered to meet OEM specifications, this heater core ensures proper cabin temperature control for models including the Chevrolet Silverado and GMC Sierra series.

• Direct replacement HVAC heater core for select GM trucks and SUVs
• Compatible with Cadillac Escalade, Chevrolet Avalanche, GMC Sierra, Hummer H2, and more
• Part number 99374 ensures precise fit and function
• Constructed to maintain optimal heat transfer and durability
• Designed for models such as Silverado 1500, Sierra 2500 HD, Yukon XL 1500, and Suburban 2500

Product Details and Compatibility

The Spectra 99374 heater core is engineered for use in a wide range of General Motors vehicles, including Cadillac Escalade, Chevrolet Avalanche 1500 and 2500, GMC Sierra 1500 Classic, Sierra 3500 Classic, and Hummer H2. This HVAC heater core is built to meet the thermal and dimensional requirements of these models, ensuring reliable heating performance and proper integration with the vehicle’s HVAC system. The part number 99374 corresponds to a core designed to replace factory units without modification.

Common Applications and Problem Resolution

• Restores heating functionality in Cadillac Escalade and Escalade ESV models
• Resolves coolant leaks and heater core blockages in Chevrolet Silverado 2500 HD and 3500 Classic
• Eliminates fogging and poor cabin heat in GMC Sierra 1500 HD Classic and Sierra 2500 HD Classic
• Addresses heater core failure symptoms in Hummer H2 and Yukon XL 2500
• Improves HVAC system efficiency in Chevrolet Avalanche and Suburban 1500

Installation Notes and Tips

Installation of the Spectra 99374 heater core requires draining the vehicle’s cooling system and removal of the dashboard or HVAC housing, depending on the model. It is recommended to consult the vehicle’s service manual for detailed instructions specific to Cadillac, Chevrolet, GMC, or Hummer models. Proper handling of coolant and careful reconnection of heater hoses will ensure optimal performance and prevent leaks.

Quality Assurance and Warranty

Manufactured to meet industry standards, the Spectra 99374 heater core undergoes quality control testing to ensure durability and fitment accuracy. While specific warranty details are not provided, Spectra products typically come with a limited warranty against defects in materials and workmanship. Verify warranty terms with the product documentation or supplier.