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Vehicle Leads/Pulls

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Lead/pull is the deviation of the vehicle from a straight path on a level road with no pressure on the steering wheel. Use the lead/pull correction table in order to verify that improper wheel alignment or worn components are not mistaken for tire lead.
  1. Did you review the General Description and perform the necessary inspections? If yes, go to next step. If no, go to SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS  .
  2. Road test the vehicle in order to verify the complaint. Select a smooth level surface to perform the test. Does the vehicle operate normally? If yes, system is okay. If no, go to next step.
  3. Inspect the tire/wheel assemblies for:
    • Correct tire pressure.
    • Correct tire size.
    Did you find and correct the condition? If yes, go to next step. If no, go to step  5 .
  4. Repair/replace the tire/wheel assemblies as necessary. After repair is complete, go to step  15 .
  5. Inspect the front/rear suspensions for the following conditions: Did you find and correct the condition? If yes, go to next step. If no, go to step  7 .
  6. Repair/replace components as necessary.
    • Tighten components to specifications.
    • Replace the wheel bearings.
    After repairs, go to step  13 .
  7. Inspect the brake system for brake drag. Refer to BRAKES DRAG . Do any of the above conditions apply? If yes, go to next step. If no, go to step  9 .
  8. Repair/replace components as necessary. After repair is complete, go to step  15 .
  9. Inspect the steering gear valve for an unbalance. If this is the cause, steering effort will be very light in the direction of the lead and effort will be heavy in the opposite direction with the vehicle parked on a smooth level surface. Does the above condition apply? If yes, go to next step. If no, go to step  11 .
  10. Replace the steering gear. Refer to Power Steering Gear Replacement in Power Steering System. After repairs, go to step  15 .
  11. Inspect the wheel alignment. Refer to Measuring Wheel Alignment in Wheel Alignment. Is the wheel alignment in specifications? If yes, go to step  13 . If no, go to next step.
  12. Adjust alignment to specifications. Refer to Measuring Wheel Alignment in Wheel Alignment. After repairs, go to step  15 .
  13. Cross-switch the front tire/wheel assemblies. Road test the vehicle on a smooth level surface. Does the vehicle still lead/pull? If yes, go to next step. If no, system is okay.
  14. Does the vehicle lead/pull in the opposite direction? If yes, see RADIAL TIRE LEAD/PULL CORRECTION  . If no, go to next step.
  15. Operate the vehicle in order to verify the repair. Did you correct the condition? If yes, system is okay. If no, go to step  3 .
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