A connection gasket, also known as a sealing gasket, is a component used in automotive systems to prevent leaks between two connected surfaces. Part number 5296559 is a specific type of connection gasket designed for use in trucks. It is made from durable materials such as rubber or silicone and features a precision cut shape that conforms to the contours of the surfaces it seals. Connection gaskets are critical components that ensure proper functioning of systems such as engines and transmissions, and can prevent damage to other parts caused by fluid leakage.