GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Safari - 4WD 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Radial Tire Lead/Pull Correction

Lead/Pull Correction Table

Step

Action

Value

Yes

No

1

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 Vehicle Certification Label in General Information.
    • Excessive radial/lateral runout.
    • Tire/wheel assembly out of balance. Refer to Tire and Wheel Balancing in Vibration Diagnosis and Correction.

Do any of the above conditions apply?

--

Go to Step 2

Go to Step 3

2

Repair/replace the tire/wheel assemblies as necessary.

Is the repair complete?

--

Go to Step 13

--

3

Inspect the front/rear suspensions for the following:

    • Damage
    • Excessive wear
    • Loose components
    • Excessive wheel bearing play (RWD)
    • Excessive hub/flange runout. (F4WD) Refer to Tire and Wheel Vibration in Vibration Diagnosis and Correction.

Do any of the above conditions apply?

--

Go to Step 4

Go to Step 5

4
  1. Repair/replace components as necessary.
  2. Tighten components to specifications. Refer to Fastener Tightening Specifications in Front Suspension or Fastener Tightening Specifications in Rear Suspension.
  3. Adjust the wheel bearings (RWD). Refer to Wheel Bearing Adjustment in Front Suspension.
  4. Replace the wheel hub (F4WD). Refer to Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension.

Is the repair complete?

--

Go to Step 13

--

5

Inspect the power steering gear and pump for the following:

    • Damage
    • Excessive wear

Do any of the above conditions apply?

--

Go to Step 6

Go to Step 7

6

Repair/replace components as necessary.

Is the repair complete?

--

Go to Step 13

--

7
  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 8

System OK

8

Does the vehicle lead/pull in the opposite direction?

--

Go to Step 9

Go to Wheel Alignment Measurement

9
  1. Cross-switch the left front tire/wheel assembly with the left rear tire/wheel assembly.
  2. Road test the vehicle on a smooth level surface.

Does the vehicle still lead/pull?

--

Go to Step 10

Go to Step 11

10
  1. Cross-switch the right front tire/wheel assembly with the right rear tire/wheel assembly.
  2. Road test the vehicle on a smooth level surface.

Does the vehicle still lead/pull?

--

Go to Wheel Alignment Measurement

Go to Step 12

11

Replace the left rear tire.

Is the repair complete?

--

System OK

--

12

Replace the left rear tire.

Is the repair complete?

--

System OK

--

13

Verify proper system operation.

Does the original condition still exist?

--

Verify the customer complaint. Begin the diagnosis again. Go to Step 1

System OK