Driver Side Engine Piston Kit – ACDelco (12674056)

Driver Side Engine Piston Kit contains combustion in the cylinder bore and transfers force to the connecting rod. It is matched by bore diameter and ring groove width rather than by model year alone.

Replace the Engine Piston Kit when compression is low on one cylinder, when oil consumption climbs without an external leak, or when a teardown shows scoring in the bore. Measure the bore before ordering: standard size will not seal a cylinder that needs honing.

Ordering reference for the Engine Piston Kit is part number 12674056, categorised under Pistons, Rings & Cylinders. Match that number against the component you are removing before you order.

Genuine ACDELCO part for the Engine Piston Kit. Where the manufacturer has superseded a number, the current reference is the one that ships.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. This is sold as a kit; if only one component has failed, confirm whether the single part is available separately.