OE Quality
60-Day Returns

Apex ATC3930 Engine Timing Cover Gasket Set
Reliable Engine Timing Cover Gasket Set for Chevrolet and GMC
The Apex ATC3930 Engine Timing Cover Gasket Set is designed for precise sealing and durability in heavy-duty Chevrolet and GMC vehicles. This gasket set ensures a secure fit for models such as the Silverado 2500 HD and Sierra 3500 Classic, maintaining engine integrity under demanding conditions.
- Compatible with Chevrolet and GMC heavy-duty trucks and vans
- Engine timing cover gasket set designed for optimal sealing performance
- Part number ATC3930 for easy identification and replacement
- Suitable for models including Avalanche 2500, Express 3500, and Yukon XL 2500
- Engineered to withstand high temperatures and pressure typical of 2500 and 3500 series vehicles
Durable Gasket Set for Heavy-Duty Chevrolet and GMC Engines
The Apex ATC3930 gasket set is engineered to provide a reliable seal for the engine timing cover on Chevrolet and GMC trucks and vans. This set is compatible with a range of 2500 and 3500 series models, including the Silverado, Sierra, Avalanche, Express, Savana, Suburban, and Yukon XL. Designed to resist oil leaks and maintain engine performance, the gasket set supports the longevity of your vehicle’s engine by preventing contamination and fluid loss. The precise fitment reduces the risk of gasket failure, which is critical for maintaining proper engine timing and operation.
Applications and Common Issues Addressed
- Prevents oil leaks around the engine timing cover
- Eliminates engine contamination from external debris
- Maintains proper engine timing by ensuring a secure seal
- Addresses gasket wear and deterioration in Chevrolet and GMC 2500/3500 series vehicles
- Helps avoid costly engine repairs due to seal failure
Installation Notes and Tips
When installing the Apex ATC3930 gasket set, ensure the engine timing cover surface is clean and free of old gasket material or debris. Proper torque specifications should be followed to avoid over-tightening, which can damage the gasket. It is recommended to inspect the timing cover and surrounding components for wear or damage during installation. Using the correct part number ATC3930 guarantees compatibility with Chevrolet Avalanche 2500, GMC Sierra 3500 Classic, and other specified models.
Quality Assurance and Warranty
Apex manufactures the ATC3930 gasket set to meet industry standards for durability and performance. While specific warranty details are not provided, Apex products typically undergo quality control to ensure reliable sealing and fitment. Using this gasket set helps maintain engine integrity and supports the operational lifespan of Chevrolet and GMC heavy-duty vehicles.
This part fits 49 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Chevrolet | Silverado 2500 HD Classic | 8.1L | V8 | N/A | |
| 2007 | Chevrolet | Silverado 3500 Classic | 8.1L | V8 | N/A | |
| 2007 | GMC | Sierra 2500 HD Classic | 8.1L | V8 | N/A | |
| 2007 | GMC | Sierra 3500 Classic | 8.1L | V8 | N/A | |
| 2006 | Chevrolet | Avalanche 2500 | 8.1L | V8 | N/A | |
| 2006 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2006 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2006 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2006 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2006 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2006 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A | |
| 2005 | Chevrolet | Avalanche 2500 | 8.1L | V8 | N/A | |
| 2005 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2005 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2005 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2005 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2005 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2005 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A | |
| 2004 | Chevrolet | Avalanche 2500 | 8.1L | V8 | N/A | |
| 2004 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2004 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2004 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2004 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2004 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2004 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A | |
| 2003 | Chevrolet | Avalanche 2500 | 8.1L | V8 | N/A | |
| 2003 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2003 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2003 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2003 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2003 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2003 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A | |
| 2002 | Chevrolet | Avalanche 2500 | 8.1L | V8 | N/A | |
| 2002 | Chevrolet | Express 3500 | 8.1L | V8 | N/A | |
| 2002 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2002 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2002 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2002 | GMC | Savana 3500 | 8.1L | V8 | N/A | |
| 2002 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2002 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2002 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A | |
| 2001 | Chevrolet | Express 3500 | 8.1L | V8 | N/A | |
| 2001 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | |
| 2001 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | |
| 2001 | Chevrolet | Suburban 2500 | 8.1L | V8 | N/A | |
| 2001 | GMC | Savana 3500 | 8.1L | V8 | N/A | |
| 2001 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | |
| 2001 | GMC | Sierra 3500 | 8.1L | V8 | N/A | |
| 2001 | GMC | Yukon XL 2500 | 8.1L | V8 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.