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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 574 (Suspension System General Diagnosis) >> Diagnostic Information And Procedures >> Vehicle Leads/Pulls

Vehicle Leads/Pulls

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: At a constant highway speed on a typical straight road, lead/pull is the amount of effort required at the steering wheel to maintain the vehicle's straight path.
  1. Did you review the General Description and perform the visual/physical inspections? If yes, go to step  2. If no, go to SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS .
  2. Road test the vehicle in order to verify the complaint. Does the vehicle operate normally? If yes, system is OK. If no, go to step  3.
  3. Inspect the tire/wheel assemblies for:
    • Correct tire pressure - Refer to the tire placard located on the edge of the driver's door.
    • Correct tire size - Refer to the tire placard located on the edge of the driver's door.
    • Abnormal tire wear or damage.
    Did you find and correct the condition? If yes, go to step  9. If no, go to step  4.
  4. Perform the RADIAL TIRE LEAD/PULL CORRECTION in TIRES AND WHEELS article. Did you find and correct the condition? If yes, go to step  9. If no, go to step  5.
  5. Inspect and correct/adjust the suspension and steering systems for: Did you find and correct the condition? If yes, go to step  9. If no, go to step  6.
  6. Inspect the brake system for brake drag. With the vehicle suspended on a hoist, brake drag can be identified by rotating each wheel several times and observing whether more force is need to rotate the left wheel or the right wheel. Refer to HYDRAULIC BRAKE SYSTEM DIAGNOSTIC STARTING POINT . Did you find and correct the condition? If yes, go to step  9. If no, go to step  7.
  7. Inspect the wheel alignment and adjust as necessary. For 2003, refer to MEASURING WHEEL ALIGNMENT in SPECIFICATIONS article. For 2004, refer to MEASURING WHEEL ALIGNMENT in SPECIFICATIONS article. Did you correct the condition? If yes, go to step  9. If no, go to step  8.
  8. Inspect the steering gear for unequal effort. The vehicle must be suspended on a hoist, the engine running, and the transmission in park or neutral. Grasp the tire assembly and manually simulate a turn from the left of center and the right of center observing whether more force is needed to turn to the left or to the right. If this condition exists replace the steering gear. Did you correct the condition? If yes, system is OK. If no, go to step  3.
  9. Operate the vehicle in order to verify the repair. Did you correct the condition? If yes, system is OK. If no, go to step  3.
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