Genuine GM Crank Pulley Harmonic Balancer VE-VF LS2 LS3 L98 L76 L77Designed by industry experts, the Genuine GM Crank Pulley Harmonic Balancer ensures proper engine function for VE VF LS2, LS3, L98, L76, and L77 models. Manufactured by GM, this high quality balancer provides stable performance, minimizing vibration and noise for a smooth driving experience. When replacing the harmonic balancer on your vehicle, it is necessary to also replace the crank bolt with part number 12557840.