Engine Crankshaft – GM (12674744)

Engine Crankshaft is a rotating or reciprocating member in the valvetrain or bottom end. It is ground to a specific journal size and, in the case of a camshaft, to a specific lift and duration profile.

Replace the Engine Crankshaft when you find scoring on a journal, when the lobe or bearing surface is worn below specification, or when the engine is apart for another failure. Measure the journals before ordering, because undersize parts exist.

Ordering reference for the Engine Crankshaft is part number 12674744, categorised under Crankshafts & Bearings. Match that number against the component you are removing before you order.

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