OE Quality
60-Day Returns

Apex AHG329 Engine Cylinder Head Gasket
Reliable Engine Cylinder Head Gasket for Select GM and Saab Models
The Apex AHG329 engine cylinder head gasket is designed to provide a precise seal for your vehicle's engine. Engineered for compatibility with various Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models, this gasket ensures proper sealing and engine performance.
- Compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles
- Fits models including 9-7x, Ascender, Bravada, Envoy, Envoy XL, Envoy XUV, Rainier, Trailblazer, and Trailblazer EXT
- Part number AHG329 for accurate identification and replacement
- Engine cylinder head gasket designed to maintain optimal compression and prevent leaks
Product Details and Compatibility
The Apex AHG329 engine cylinder head gasket is manufactured to meet the specifications required for a range of mid-2000s SUVs and crossovers. This gasket is compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles, specifically models such as the Trailblazer, Envoy series, Ascender, Bravada, Rainier, and the Saab 9-7x. The gasket is engineered to provide a reliable seal between the engine block and cylinder head, helping to maintain engine compression and prevent coolant or oil leaks that can lead to engine damage.
Common Applications and Problem Resolution
- Seals combustion chambers to maintain engine compression
- Prevents coolant leaks between the engine block and cylinder head
- Stops oil leaks that can cause engine contamination
- Addresses engine overheating issues related to gasket failure
- Helps reduce engine misfires caused by sealing problems
Installation Notes and Tips
When installing the Apex AHG329 cylinder head gasket, ensure the engine surfaces are clean and free of debris or old gasket material. Proper torque specifications should be followed according to the vehicle manufacturer’s guidelines to avoid warping or improper sealing. It is recommended to inspect the cylinder head and engine block for any damage or warping before installation to ensure a proper fit and seal.
Quality Assurance and Warranty
Apex manufactures the AHG329 gasket to meet industry standards for durability and performance. While specific warranty details are not provided, Apex products typically undergo quality control processes to ensure reliability. For best results, use this gasket as a direct replacement part for the specified vehicle makes and models.
This part fits 46 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2009 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2009 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2009 | Saab | 9-7x | 4.2L | L6 | N/A | |
| 2008 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2008 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2008 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2008 | Saab | 9-7x | 4.2L | L6 | N/A | |
| 2007 | Buick | Rainier | 4.2L | L6 | N/A | |
| 2007 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2007 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2007 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2007 | Saab | 9-7x | 4.2L | L6 | N/A | |
| 2006 | Buick | Rainier | 4.2L | L6 | N/A | |
| 2006 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2006 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | |
| 2006 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2006 | GMC | Envoy XL | 4.2L | L6 | N/A | |
| 2006 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2006 | Saab | 9-7x | 4.2L | L6 | N/A | |
| 2005 | Buick | Rainier | 4.2L | L6 | N/A | |
| 2005 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2005 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | |
| 2005 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2005 | GMC | Envoy XL | 4.2L | L6 | N/A | |
| 2005 | GMC | Envoy XUV | 4.2L | L6 | N/A | |
| 2005 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2005 | Saab | 9-7x | 4.2L | L6 | N/A | |
| 2004 | Buick | Rainier | 4.2L | L6 | N/A | |
| 2004 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2004 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | |
| 2004 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2004 | GMC | Envoy XL | 4.2L | L6 | N/A | |
| 2004 | GMC | Envoy XUV | 4.2L | L6 | N/A | |
| 2004 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2004 | Oldsmobile | Bravada | 4.2L | L6 | N/A | |
| 2003 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2003 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | |
| 2003 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2003 | GMC | Envoy XL | 4.2L | L6 | N/A | |
| 2003 | Isuzu | Ascender | 4.2L | L6 | N/A | |
| 2003 | Oldsmobile | Bravada | 4.2L | L6 | N/A | |
| 2002 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | |
| 2002 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | |
| 2002 | GMC | Envoy | 4.2L | L6 | N/A | |
| 2002 | GMC | Envoy XL | 4.2L | L6 | N/A | |
| 2002 | Oldsmobile | Bravada | 4.2L | L6 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.