GM Service Manual Online
For 1990-2009 cars only

On-vehicle balancing will help correct vibrations due to brake drum, rotor, and wheel cover imbalances.

    Notice: Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.

  1. During on-vehicle balancing, do not remove the balance weights from the off-vehicle dynamic balance.
  2. If more than 1 ounce of additional weight is required, split the weight between the inner and the outer rim flanges.
  3. Spin the driven tire and wheel assemblies using the engine.