Cylinder – GM (19109239)

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.

This Cylinder is listed as part 19109239 (Pistons, Rings & Cylinders). Where a number has been superseded, the current reference is the one that ships, so check any supersession note before ordering.

This is GM dealer-sourced stock rather than an equivalent, so the number on the Cylinder traces straight back to the manufacturer.