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Vehicle Leads/Pulls

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
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 so, proceed to next step. If not, see 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 so, system is okay. If not, proceed to next step.
  3. Inspect the tire/wheel assemblies for correct tire pressure and correct tire size. Do any of the above conditions apply? If so, proceed to next step. If not, go to step  5.
  4. Repair/replace the tire/wheel assemblies as necessary. When complete, go to step  15.
  5. Inspect the front/rear suspensions for the following conditions: Do any of the above conditions apply? If so, proceed to next step. If not, go to step  7.
  6. Repair or replace the components as necessary. Tighten the components to specifications. Replace the wheel bearings. When complete, go to step  15.
  7. Inspect the brake system for brake drag. See BRAKES DRAG . Do any of the above conditions apply? If so, proceed to next step. If not, go to step  9.
  8. Repair/replace components as necessary. When 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 so, proceed to next step. If not, go to step  11.
  10. Replace the steering gear. See POWER STEERING GEAR REPLACEMENT . When complete, go to step  15.
  11. Inspect the wheel alignment. See GRAND PRIX . Is the wheel alignment in specifications? If so, go to step  13. If not, proceed to next step.
  12. Adjust alignment to specifications. See GRAND PRIX . When complete, 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 so, proceed to next step. If not, system is okay.
  14. Does the vehicle lead/pull in the opposite direction? If so, see RADIAL TIRE LEAD/PULL CORRECTION in TIRES & WHEELS article. If not, proceed to next step.
  15. Operate the vehicle in order to verify the repair. Did you correct the condition? If so, system is okay. If not, go to step  3.
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