Spectra 93058 HVAC Heater Core - Front

Spectra 93058 HVAC Heater Core

The Spectra 93058 HVAC heater core is a direct-fit replacement for select GM, Buick, Saab, and Isuzu applications with front heater core placement. Built to meet or exceed original equipment performance, it supports consistent cabin heat and dependable HVAC operation in vehicles such as the Chevrolet Trailblazer and GMC Envoy.

• Direct replacement HVAC heater core for front-mounted applications
• Engineered to match OE performance standards
• Compatible with select Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x models
• Cross-references Four Seasons 90058 for the same application
• Part number: 93058

Detailed Fitment and Function

This heater core is used in the vehicle’s HVAC system to transfer heat into the cabin through the heater box. It fits 2003-2009 Chevrolet Trailblazer, front; 2003-2009 GMC Envoy, front; 2005-2009 Saab 9-7x, front; 2003-2008 Isuzu Ascender, front; 2004-2007 Buick Rainier, front; 2003-2006 Chevrolet Trailblazer EXT, front; 2003-2006 GMC Envoy XL, front; 2004-2005 GMC Envoy XUV, front; 2003-2004 Chevrolet SSR, N/A, replaces OEM # 52498633; and 2003-2004 Oldsmobile Bravada, front. The Spectra 93058 is a practical OE-style solution for restoring heat output in these platforms, including common search applications like Chevrolet Trailblazer heater core replacement and GMC Envoy front heater core replacement.

Common Problems It Can Address

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging caused by heater core leakage
• Restricted coolant flow through the HVAC core
• Loss of heater performance in Trailblazer, Envoy, and related models

Installation Notes and Quality

Installation requires access to the HVAC case and proper coolant system service procedures. Verify vehicle year, model, and heater core position before ordering, especially on applications with front placement and the Chevrolet SSR OEM replacement note. Spectra Premium states that its manufacturing process, engineering controls, and quality checks are used to help these heater cores meet or exceed the performance of the original equipment they replace.