GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

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

Road test the vehicle to verify the complaint.

Select a smooth level surface to perform the test.

Does the condition exist?

Go to Step 2

System OK

2

Inspect the tire/wheel assemblies for the following:

    • Correct tire pressure
        Refer to Tire Inflation Pressure Specifications in Maintenance and Lubrication.
    • Correct tire size
        Refer to Tire Placard in General Information.

Do any of the above conditions apply?

Go to Step 3

Go to Step 4

3

Repair/replace the tire/wheel assemblies as necessary.

Is the repair complete?

Go to Step 14

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4

Inspect the front/rear suspensions for the following:

    • Vehicle trim height
        Refer to Trim Height Inspection .
    • Excessive wear or loose components
    • Excessive wheel bearing play
         Refer to Wheel Bearings Diagnosis - Sealed .

Do any of the above conditions apply?

Go to Step 5

Go to Step 6

5

Replace components as necessary.

    • Tighten components to specifications. Refer to Fastener Tightening Specifications in Front Suspension or Fastener Tightening Specifications in Rear Suspension.
    • Replace the wheel bearing/hub. Refer to Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension.

Is the repair complete?

Go to Step 14

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6

Inspect the front brake pads. Refer to Brake Pad Inspection in Disc Brakes.

Do any of the above conditions apply?

Go to Step 7

Go to Step 8

7

Repair/replace components as necessary.

Is the repair complete?

Go to Step 14

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8

Inspect the steering gear for damage.

Does the above condition apply?

Go to Step 9

Go to Step 10

9

Replace the steering gear. Refer to Steering Gear Replacement in Power Steering System.

Is the repair complete?

Go to Step 14

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10

Inspect the wheel alignment. Refer to Wheel Alignment Measurement in Wheel Alignment.

Is the wheel alignment within specifications?

Go to Step 12

Go to Step 11

11

Adjust alignment to specifications. Refer to Wheel Alignment Specifications in Wheel Alignment.

Is the repair complete?

Go to Step 14

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12

  1. Cross-switch the front tire/wheel assemblies.
  2. Road test the vehicle on a smooth level surface.

Does the vehicle still lead/pull?

Go to Step 11

System OK

13

Does the vehicle lead/pull in the opposite direction?

Go to Radial Tire Lead/Pull Correction in Tires and Wheels

Go to Step 14

14

Verify proper system operation.

Does the original condition still exist?

Go to Step 1

System OK