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Home >> Chevrolet >> 2011 >> Impala LTZ >> Repair and Diagnosis >> Suspension >> Wheels & Tire System >> Tires And Wheels >> Diagnostic Information and Procedures >> Radial Tire Lead/Pull Correction

Radial Tire Lead/Pull Correction

Lead/Pull Correction Table

Step Action Yes No
DEFINITION: Lead/pull is the deviation of the vehicle from a straight path on a level road with no pressure on the steering wheel. Lead is usually caused by the following conditions:
  • Poor tire construction
  • Uneven brake assemblies
  • Improper tire and wheel alignment In the front tires (rear tires will not cause lead)

Tire construction can be a cause of lead in a vehicle. An example of this is placement of the belt. Off center belts on radial tires can cause the tire to develop a side force while rolling straight down the road, and the tire will tend to roll like a cone.
Use the lead/pull correction table in order to verify that improper tire and wheel alignment is not mistaken for tire lead.
1 Inspect and repair/replace the tire/wheel assemblies for the following conditions:
  • Correct tire pressure
  • Excessive/uneven tire wear
  • Correct tire size
  • Excessive radial/lateral wheel runout
  • Out of balance

Is the action complete?		 Go to Step 2  -
2 Inspect and repair the front and rear suspensions for the following conditions:
  • Damage
  • Excessive wear
  • Loose components
  • Excessive wheel bearing play

Is the action complete?		 Go to Step 3  -
3 Inspect and repair the power steering gear and pump for the following conditions:
  • Damage
  • Excessive wear

Is the action complete?		 Go to Step 4  -
4
  1. Cross-switch the front tire/wheel assemblies.
  2. Road test the vehicle.
Does the vehicle still lead/pull?		 Go to Step 5  System OK
5 Does the vehicle lead/pull in the opposite direction? Go to Step 6  Go to Braking Action Uneven - Pulls to One Side
6
  1. Cross-switch the left front tire/wheel assembly with the left rear tire/wheel assembly.
  2. Road test the vehicle.
Does the vehicle still lead/pull?		 Go to Step 7  Go to Step 8 
7
  1. Cross-switch the right front tire/wheel assembly with the right rear tire/wheel assembly.
  2. Road test the vehicle.
Does the vehicle still lead/pull?		 Go to Braking Action Uneven - Pulls to One Side Go to Step 9 
8 Replace the left rear tire.
Is the repair complete?		 System OK -
9 Replace the right rear tire.
Is the repair complete?		 System OK -
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