Grand AM V6-3.4L VIN E (2001)
Tires: Symptom Related Diagnostic Procedures
Irregular or Premature Wear
Tire Wear
Inspection Procedure
1. Inspect the front tire wear.
2. Inspect the rear tire wear.
3. Rotate the tires if any of the following conditions exist:
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The amount of time or mileage since the last tire rotation matches the maintenance schedule.
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The outer tread blocks are worn more than the middle tread blocks (1).
^
The outer tread blocks are worn more than the inner tread blocks (2).
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The middle tread blocks are worn more than the outer tread blocks (4).
4. Measure the wheel alignment if any of the following conditions exist:
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The tread blocks have feathered edges (3).
^
The outer tread blocks are worn more than the inner tread blocks (2).
^
The inner tread blocks are worn more than the outer tread blocks (2).
5. Inspect the struts or the shock absorbers if the tire tread exhibits a cupped appearance (3).
Waddle Complaint
Tire waddle is a side to side movement at the front of the vehicle and/or the rear of the vehicle. Tire waddle can be caused by the following conditions:
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A steel belt not being straight within the tire
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Excessive lateral runout of the tire
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Excessive lateral runout of the wheel
The tire waddle is most noticeable at a low speed of about 8-48 km/h (5-30 mph). Tire waddle may appear as ride roughness at 80-113 km/h (50-70
mph).
Tire waddle may appear as a vibration at 80-113 km/h (50-70 mph).
