OE Quality
60-Day Returns

Universal Air HT399154C HVAC Heater Core - Front
Reliable HVAC Heater Core Replacement for Select GM and Isuzu Models
The Universal Air Heater Core Aluminum HT399154C is designed to restore efficient heating performance in your vehicle's HVAC system. Engineered for compatibility with various Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models, this heater core ensures proper fit and function.
Key Features of the HT399154C Heater Core
- Constructed from durable aluminum for enhanced heat transfer and corrosion resistance
- Compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles
- Fits models including 9-7x, Ascender, Bravada, Envoy, Envoy XL, Envoy XUV, Rainier, and Trailblazer
- Part number HT399154C ensures precise identification and fitment
- Designed for direct replacement in HVAC systems to maintain cabin comfort
About the Heater Core Aluminum Product Line
The Heater Core Aluminum line by Universal Air focuses on providing heater cores made from aluminum, a material known for its efficient heat conduction and resistance to corrosion. This product line supports reliable heating system operation by delivering consistent warmth and durability, making it suitable for the specified GM and Isuzu models requiring dependable HVAC heater core replacements.
Detailed Product Description
The HT399154C heater core is a critical component in your vehicle’s heating, ventilation, and air conditioning system. It functions by transferring heat from the engine coolant to the air blown into the cabin, ensuring comfortable interior temperatures. Manufactured with aluminum, this heater core offers improved thermal efficiency and longevity compared to traditional materials. It is engineered to fit a range of vehicles including Buick 9-7x, Chevrolet Trailblazer, GMC Envoy series, Isuzu Ascender, Oldsmobile Bravada, and Saab models, providing a reliable replacement option for maintaining HVAC performance.
Common Issues Addressed by the HT399154C Heater Core
- Insufficient cabin heating due to clogged or leaking heater core
- Coolant leaks inside the vehicle causing foggy windows or damp carpets
- Overheating engine symptoms linked to heater core failure
- Unpleasant odors from coolant entering the HVAC system
- Reduced HVAC system efficiency impacting passenger comfort
Installation Notes and Tips
- Ensure compatibility by verifying vehicle make and model before installation
- Drain the cooling system prior to removal of the old heater core to prevent spills
- Handle the aluminum core carefully to avoid damage to fins and tubes
- Replace all associated seals and hoses to prevent leaks
- Bleed the cooling system after installation to remove air pockets
Quality Assurance and Warranty Information
Universal Air’s HT399154C heater core is manufactured to meet industry standards for durability and performance. While specific warranty details may vary, Universal Air products typically include coverage against manufacturing defects. It is recommended to consult the product documentation or supplier for exact warranty terms related to this heater core.
This part fits 60 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2009 | Chevrolet | Trailblazer | N/A | Heater Core Aluminum | |||
| 2009 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2009 | Saab | 9-7x | N/A | Heater Core Aluminum | |||
| 2008 | Chevrolet | Trailblazer | N/A | Heater Core Aluminum | |||
| 2008 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2008 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2008 | Saab | 9-7x | N/A | Heater Core Aluminum | |||
| 2007 | Buick | Rainier | N/A | Heater Core Aluminum | |||
| 2007 | Chevrolet | Trailblazer | N/A | Heater Core Aluminum | |||
| 2007 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2007 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2007 | Saab | 9-7x | N/A | Heater Core Aluminum | |||
| 2006 | Buick | Rainier | N/A | Heater Core Aluminum | |||
| 2006 | Chevrolet | Trailblazer | LS | 5.3L | V8 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | 4.2L | L6 | Front | Heater Core Aluminum | |
| 2006 | Chevrolet | Trailblazer | B | 4.2L | L6 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | LT | 5.3L | V8 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | SS | 6.0L | V8 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | A | 4.2L | L6 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | LS | 4.2L | L6 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | LT | 4.2L | L6 | N/A | Heater Core Aluminum |
| 2006 | Chevrolet | Trailblazer | Base | 4.2L | L6 | N/A | Heater Core Aluminum |
| 2006 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2006 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2006 | Saab | 9-7x | N/A | Heater Core Aluminum | |||
| 2005 | Buick | Rainier | N/A | Heater Core Aluminum | |||
| 2005 | Chevrolet | Trailblazer | R | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | A | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | Front | Heater Core Aluminum | |||
| 2005 | Chevrolet | Trailblazer | Q | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | LS | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | LT | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | Base | N/A | Heater Core Aluminum | ||
| 2005 | Chevrolet | Trailblazer | B | N/A | Heater Core Aluminum | ||
| 2005 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2005 | GMC | Envoy XL | N/A | Heater Core Aluminum | |||
| 2005 | GMC | Envoy XUV | N/A | Heater Core Aluminum | |||
| 2005 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2005 | Saab | 9-7x | N/A | Heater Core Aluminum | |||
| 2004 | Buick | Rainier | N/A | Heater Core Aluminum | |||
| 2004 | Chevrolet | Trailblazer | LS | N/A | Heater Core Aluminum | ||
| 2004 | Chevrolet | Trailblazer | A | N/A | Heater Core Aluminum | ||
| 2004 | Chevrolet | Trailblazer | Front | Heater Core Aluminum | |||
| 2004 | Chevrolet | Trailblazer | North Face | N/A | Heater Core Aluminum | ||
| 2004 | Chevrolet | Trailblazer | Base | N/A | Heater Core Aluminum | ||
| 2004 | Chevrolet | Trailblazer | LT | N/A | Heater Core Aluminum | ||
| 2004 | Chevrolet | Trailblazer | B | N/A | Heater Core Aluminum | ||
| 2004 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2004 | GMC | Envoy XUV | N/A | Heater Core Aluminum | |||
| 2004 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2004 | Oldsmobile | Bravada | N/A | Heater Core Aluminum | |||
| 2003 | Chevrolet | Trailblazer | Front | Heater Core Aluminum | |||
| 2003 | Chevrolet | Trailblazer | North Face | N/A | Heater Core Aluminum | ||
| 2003 | Chevrolet | Trailblazer | Base | N/A | Heater Core Aluminum | ||
| 2003 | Chevrolet | Trailblazer | LS | N/A | Heater Core Aluminum | ||
| 2003 | Chevrolet | Trailblazer | LT | N/A | Heater Core Aluminum | ||
| 2003 | Chevrolet | Trailblazer | LTZ | N/A | Heater Core Aluminum | ||
| 2003 | GMC | Envoy | Front | Heater Core Aluminum | |||
| 2003 | Isuzu | Ascender | Front | Heater Core Aluminum | |||
| 2003 | Oldsmobile | Bravada | N/A | Heater Core Aluminum |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.