GM Service Manual Online
For 1990-2009 cars only

Perform wheel balancing with an electronic off-vehicle balancer. The balancer is easy to use and gives both a static and a dynamic balance. Unlike on-vehicle balancing, the off-vehicle balancer does not correct for drum or rotor imbalance. This drawback is overcome by its accuracy. Secure the wheel on the balancer with a cone through the back side of the centerhole, not through the wheel nut holes.