When you need to replace the crankshaft sprocket on your GM vehicle, don't mess around with aftermarket guesses. This is the real deal – the GM Genuine Parts crankshaft sprocket (part number 12642713). It's the exact same part that was designed, engineered, and tested by General Motors engineers for your specific Chevrolet, Buick, GMC, or Cadillac. Some of these might have even been sold as ACDelco OE parts before. That means it's guaranteed to fit right and work right, keeping your engine's timing spot on. Using genuine parts is the best way to keep your ride running like it should. Just a heads-up, per California law: this product may contain chemicals known to cause cancer or reproductive harm. (www.P65Warnings.ca.gov).
