This is what you will need to remove your factory harmonic balancer. It is also known as the crank pulley or damper. There are two separate kits, you will need both to remove your balancer. You will need the universal balancer puller itself, and the retrofit kit which are the GM balancer specific bolts and spacers needed to attach the puller to the balancer to remove your balancer, and the universal puller will reinstall it.