Description: The GM Crankshaft 12732518 is the factory forged crankshaft for the 6.2L V8 in Silverado, Sierra, Escalade, Tahoe, Suburban, Yukon, and Corvette (without Z06 or dry sump). It converts piston motion into rotational output and must meet exact balance and dimensional tolerances ; genuine GM metallurgy and factory-correct stroke.