Cylinder – GM (18030425)

Cylinder is a service part for the engine, transmission or driveline. Because several build codes can share the same external description, the part number is the only dependable match.

Replace the Cylinder when inspection shows wear, cracking or leakage that the surrounding components cannot explain. Rule out the cheaper causes first.

The Cylinder in this listing carries part number 18030425 and sits in the Pistons, Rings & Cylinders category. The number stamped on the original part is the only reliable cross-reference.

The stock here is genuine GM, and this Cylinder keeps the original engineering number, which matters once a number has been superseded more than once.