Preliminary Inspection

Inspect the tires.
- Check the tire pressures with all normal loads in the vehicle and the tires cold. REFER to VEHICLE CERTIFICATION (VC) CODES .
- Verify that all tires are sized to specification. REFER to VEHICLE CERTIFICATION (VC) CODES .
- Inspect the tires for incorrect wear and damage. Install new tires as necessary.
Inspect the chassis and underbody.
- Remove any excessive accumulation of mud, dirt or road deposits from the chassis and underbody.
Inspect for aftermarket equipment.
- Check for aftermarket changes to the steering, suspension, and wheel and tire components (such as competition or heavy duty). The specifications shown in this information do not apply to vehicles equipped with aftermarket equipment.
Road test the vehicle.
- If any suspension alignment or ride height concerns are present, refer to Symptom Chart : Suspension System.
- Verify the customer concern by carrying out a road test on a smooth road. If any vibrations are present, refer to Symptom Chart: NVH .