Piston – GM (19431932)

Piston 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 Piston 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.

For this Piston the reference is 19431932, in our Pistons, Rings & Cylinders range. Compare it with the number on the part you are replacing rather than with a photograph.

Genuine GM supplied for this Piston, with the engineering number unchanged from the factory reference stamped on the original.