GM Genuine Parts 12556582 Crankshaft Sprocket (not shown)

GM Genuine Parts Engine Timing Crankshaft Sprockets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sprockets are part of the valve train system that opens and closes the valves at the appropriate time in the combustion cycle. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

• Gear attached to the crankshaft that timing chain rides on
• Synchronizes with the camshaft sprocket with the use of a timing chain
• Part of the valve train system that opens and closes the valves at the appropriate time in the combustion cycle
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment [OE]
• GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
• GM regularly updates production and service part designs to integrate new materials and technologies