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Test Description

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic table:

  1. 4. A buildup of foreign material on a tire and wheel assembly and/or a damaged, abnormally or excessively worn tire and wheel assembly could cause a vibration disturbance
  2. 6. Tire and wheel assemblies that exhibit excessive runout when measured while mounted on the vehicle, may or may not be contributing to, or causing a vibration disturbance. On-vehicle runout, if present, could contribute to, or cause a vibration disturbance, but the cause of the on-vehicle runout may not be the tire and wheel assemblies
  3. 7. Tire and wheel assemblies that exhibit excessive runout when measured off of the vehicle could cause a vibration disturbance
  4. 10. Brake rotors that exhibit excessive imbalance could contribute to, or possibly cause a vibration disturbance
  5. 11. A hub/axle flange and/or wheel studs that exhibit excessive runout could cause a vibration disturbance
  6. 12. When the tire and wheel assembly and the hub axle flange are mounted to each other, the combined stack-up of their marginal amounts of runout could combine to produce an excessive amount of runout, which could cause a vibration disturbance. Match-mounting or vectoring the tire and wheel assembly to the hub/axle flange will modify the amount of combined runout
  7. 16. Force variation may be present in a tire and wheel assembly that exhibited acceptable balance and runout. Force variation, if present, could contribute to, or cause a vibration disturbance
  8. 18. Vibration disturbances could be affected by, or possibly caused by, components that are susceptible to steering input and/or torque-load input
  9. 20. On-vehicle balancing, or finish-balancing can be used to reduce small amounts of imbalance which may be present as a result of the combined stack-up of the tire and wheel assembly with other components which may exhibit marginal balance
    Fig 1: Tyre And Wheel Vibration - Diagnostic Table (Step 1-13)
    G02580616Courtesy of GENERAL MOTORS CORP.
    Fig 2: Tyre And Wheel Vibration - Diagnostic Table (Step 14-21)
    G02580617Courtesy of GENERAL MOTORS CORP.
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