Driver Side Piston – GM (12699530)

Driver Side Piston is a reciprocating component that seals the combustion chamber. Clearance and surface finish decide whether it seals correctly, so the bore has to be measured before a replacement is chosen.

Replace the Driver Side Piston when a leak-down test shows air escaping past the rings, when the skirt is scuffed, or when ring lands are cracked. Check the ring end gap in the bore it will run in.

This Driver Side Piston is listed as part 12699530 (Pistons, Rings & Cylinders). Where a number has been superseded, the current reference is the one that ships, so check any supersession note before ordering.

Genuine GM part for the Driver Side Piston. Where the manufacturer has superseded a number, the current reference is the one that ships.

This listing is specifically for the driver (left-hand) side; the opposite side is a separate part number.