ACDelco 12556031 GM Original Equipment Cylinder Head Gasket

The ACDelco 12556031 is a GM Original Equipment cylinder head gasket designed as a direct replacement for select GM vehicles. As a genuine OE component, it meets the same fit, form, and function requirements as the gasket originally installed at the factory.

The cylinder head gasket performs one of the most critical sealing functions in the engine, containing combustion pressure and sealing coolant and oil passages between the cylinder head and the engine block. A properly sealed head gasket is essential for maintaining engine compression, preventing coolant loss, and avoiding oil contamination.

Key Features:

• Genuine GM Original Equipment — not an aftermarket substitute
• Seals combustion chambers against compression loss
• Seals coolant and oil passages between the head and engine block
• Designed, engineered, and tested to GM's rigorous quality standards
• Provides OE-matching performance, durability, and service life
• Direct-fit replacement requiring no modification

Also referenced as GM part number 12556031, this gasket is the factory-recommended replacement for the engine mechanical system. Sold individually.