Test Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. 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:
- 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.
- 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.
- 7: Tire and wheel assemblies that exhibit excessive runout when measured off of the vehicle could cause a vibration disturbance.
- 8: Tire and wheel assemblies that exhibit marginal runout (within acceptable limits, but close to the maximum) when measured off of the vehicle could still be contributing to a vibration disturbance, if its mating hub/axle flange also exhibits marginal runout. 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.
- 13: Brake rotors that exhibit excessive imbalance could contribute to, or possibly cause a vibration disturbance.
- 14: A hub/axle flange and/or wheel studs that exhibit excessive runout could cause a vibration disturbance.
- 15: 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.
- 19: 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.
- 21: Vibration disturbances could be affected by, or possibly caused by, components that are susceptible to steering input and/or torque-load input.
- 23: 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.
Vibration Analysis - Tire and Wheel
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Has the Vibration Analysis - Road Testing table been completed? | Go to Step 2 | Go to Vibration Analysis - Road Testing |
| 2 | Based on the Vibration Analysis - Road Testing table, is the concern first-order tire and wheel assembly related? | Go to Step 4 | Go to Step 3 |
| 3 | Based on the Vibration Analysis - Road Testing table, is the concern second-order, or higher-order tire and wheel assembly related? | Go to Step 19 | Go to Vibration Analysis - Road Testing |
| 4 | Visually inspect the tire and wheel assemblies for the following:
Refer to Tire and Wheel Inspection . Do any of the tire and wheel assemblies exhibit any of the conditions listed? |
Go to Step 5 | Go to Step 6 |
| 5 |
|
Go to Step 24 | - |
| 6 | Measure the on-vehicle runout of the tire and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle . Does the runout measurement indicate a runout concern? |
Go to Step 7 | Go to Step 11 |
| 7 | Measure the off-vehicle runout of the tire and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - Off-Vehicle . Does the runout measurement indicate a runout concern? |
Go to Step 20 | Go to Step 8 |
| 8 | Are any of the tire and wheel assembly runout measurements marginal (within acceptable limits, but close to the maximum)? | Go to Step 9 | Go to Step 14 |
| 9 |
|
Go to Step 10 | Go to Step 20 |
| 10 | Remeasure the on-vehicle runout of the tire and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle . Does the remeasurement indicate a runout concern? |
Go to Step 14 | Go to Step 24 |
| 11 | Inspect the balance of the tire and wheel assemblies. Refer to Tire and Wheel Assembly Balancing - Off-Vehicle . Are any or the tire and wheel assemblies out of balance? |
Go to Step 12 | Go to Step 13 |
| 12 | Balance the tire and wheel assemblies as necessary. Refer to Tire and Wheel Assembly Balancing - Off-Vehicle . Were you able to achieve balance? |
Go to Step 24 | Go to Vibration Diagnostic Aids |
| 13 |
|
Go to Step 17 | Go to Step 18 |
| 14 | Measure the runout of the hub/axle flanges and the wheel studs. Refer to Hub/Axle Flange and Wheel Stud Runout Inspection . Does the runout measurement indicate a runout concern? |
Go to Step 16 | Go to Step 15 |
| 15 |
|
Go to Step 24 | Go to Step 2 |
| 16 | Replace components as required. Refer to the following procedures as necessary:
Did you complete the replacement? |
Go to Step 24 | - |
| 17 | Replace the brake rotors as necessary. Refer to the appropriate procedure in Disc Brakes:
Did you complete the replacement? |
Go to Step 24 | - |
| 18 | Inspect for radial and lateral force variation. Refer to Tire and Wheel Assembly Isolation Test . Were you able to isolate one or more of the tire and wheel assemblies as the cause of the disturbance? |
Go to Step 20 | Go to Step 21 |
| 19 | Inspect for radial and lateral force variation. Refer to Tire and Wheel Assembly Isolation Test . Were you able to isolate one or more of the tire and wheel assemblies as the cause of the disturbance? |
Go to Step 20 | Go to Step 22 |
| 20 | Replace the tire(s) and/or wheel(s) as necessary. Refer toTire Mounting and Dismounting
in Tires and Wheels. Did you complete the replacement? |
Go to Step 24 | - |
| 21 | Perform the Vibration Analysis - Hub/Axle Input table. Refer to Vibration Analysis - Hub and/or Axle Input . Did you find and correct a condition? |
Go to Step 24 | Go to Step 23 |
| 22 | Perform the Vibration Analysis - Hub/Axle Input table. Refer to Vibration Analysis - Hub and/or Axle Input . Did you find and correct a condition? |
Go to Step 24 | Go to Vibration Diagnostic Aids |
| 23 | Finish-balance the tire and wheel assemblies ON-vehicle. Refer to Tire and Wheel Assembly Balancing - On-Vehicle . Did you complete the on-vehicle finish balancing? |
Go to Step 24 | - |
| 24 |
|
Go to Step 2 | System OK |