GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1997 🢒 GMC P62 Commercial Chassis 🢒 Suspension 🢒 Tires and Wheels 🢒 Rear Wheel Drive Radial Tire Lead/Pull Cor Chart

Radial Tire Lead/Pull

Step

Action

Value(s)

Yes

No

1

Check the tire pressure. Refer to Tire Inflation Pressure.

Is the tire pressure adjusted correctly?

--

Go to Step 3

Go to Step 2

2

Inflate the tires to the recommended pressure.

Is the repair complete?

--

Go to Step 3

--

3

Is the suspension adjusted to the proper trim height?

Front: 275.6 mm (10.85 in)

Rear: 162.8 mm (6.41 in)

Go to Step 5

Go to Step 4

4

Adjust the suspension trim height

Is the repair complete?

--

Go to Step 5

--

5

Are the brakes dragging?

--

Go to Step 6

Go to Step 7

6

Adjust or repair the brakes.

Is the repair complete?

--

Go to Step 7

--

7

Road test the vehicle.

Does the vehicle pull to the left or the right?

--

Go to Step 8

System OK

8
  1. Cross switch the tire and wheel assemblies.
  2. Road test the vehicle.

Does the vehicle pull to the left of the right?

--

Go to Step 9

System OK

9

Does the lead or pull occur to the same side as it did in the previous steps?

--

Go to Step 10

Go to Step 20

10

Check the front end alignment. Refer to Front End Alignment.

Is the front end out of alignment?

--

Go to Step 16

Go to Step 11

11

Align the front wheels to specifications. Refer to Front Wheel Alignment.

Is the front suspensions adjusted correctly?

--

Go to Step 12

--

12

Road test the vehicle.

Does the vehicle pull to the left?

--

Go to Step 13

Go to Step 14

13
  1. Decrease the right caster angle.
  2. Do not exceed 2 degrees difference between the left and the right caster.
  3. Road test the vehicle.

Does the vehicle pull/lead to the left?

--

--

System OK

14

Road test the vehicle.

Does the vehicle pull to the right?

--

Go to Step 15

System OK

15
  1. Decrease the left caster angle.
  2. Do not exceed 2 degrees difference between the left and the right caster.
  3. Road test the vehicle.

Does the vehicle pull/lead?

--

--

System OK

16

Road test the vehicle.

Does the vehicle pull to the left?

--

Go to Step 17

Go to Step 18

17
  1. Set the left caster at the top specification. Refer to Front Wheel Alignment.
  2. Set the right caster 1 degree less.
  3. Road test the vehicle.

Does the vehicle pull/lead to the left?

--

Go to Step 13

System OK

18

Road test the vehicle.

Does the vehicle pull to the right?

--

Go to Step 19

System OK

19
  1. Set the right caster at the top specification. Refer to Front Wheel Alignment.
  2. Set the left caster 1 degree less.
  3. Road test the vehicle.

Does the vehicle pull/lead to the right?

--

Go to Step 15

System OK

20
  1. Swap the left front tire and wheel assembly with the left rear tire and wheel assembly.
  2. Road test the vehicle.

Does the vehicle lead/pull in the opposite direction as in the previous steps?

--

Go to Step 20

Go to Step 21

21

Replace the left rear tire.

Is the repair complete?

--

System OK

--

22
  1. Swap the right front tire and wheel assembly with the right rear tire and wheel assembly.
  2. Road test the vehicle.

Does the vehicle pull/lead in the opposite direction as in previous steps?

--

Go to Step 16

Go to Step 23

23

Replace the right rear tire.

Is the repair complete?

--

System OK

--