ACDelco 12637785 Cylinder Head Gasket Grade C - 1.05mm

The ACDelco 12637785 is a GM Genuine Parts cylinder head gasket designed for 6.6L Duramax diesel engines. This Grade C gasket features a 1.05mm thickness and is engineered as a direct OE replacement for the driver side cylinder head.

Key Features:

• GM Original Equipment part designed and validated by General Motors
• Grade C specification with 1.05mm compressed thickness
• Manufactured to meet rigorous GM engineering standards for fit, form, and function
• Driver side application for proper engine sealing
• Designed for 6.6L Duramax diesel engines (LB7, LLY, LBZ, LMM, LGH, LML variants)
• High-quality construction ensures reliable long-term performance

This cylinder head gasket provides the critical seal between the cylinder head and engine block, preventing combustion gases, coolant, and oil from escaping. As a genuine GM part, it delivers the precise engineering and quality assurance expected from factory original equipment.