Vehicle Leads/Pulls. GMC Truck Safari

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2000 🢒 Safari - 4WD 🢒 Suspension 🢒 Suspension General Diagnosis 🢒 Vehicle Leads/Pulls

Step

Action

Yes

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.

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

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.

Do any of the above conditions apply?

Go to Step 3

Go to Step 4

Repair/replace the tire/wheel assemblies as necessary.

Is the repair complete?

Go to Step 14

Inspect the front/rear suspensions for the following:

•	Inspect Vehicle trim height, Refer to Trim Height Inspection

•	Excessive wear or loose components, Refer to Suspension General Diagnosis

•	Excessive wheel bearing play , Refer to Wheel Bearings Diagnosis or Wheel Bearings Diagnosis - Sealed

Do any of the above conditions apply?

Go to Step 5

Go to Step 6

Repair/replace components as necessary.

•	Tighten components to specifications. Refer to Fastener Tightening Specifications in Front Suspension or Fastener Tightening Specifications in Rear Suspension.

•	Adjust or replace the wheel bearings . Refer to Wheel Bearing Adjustment or Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension.

Is the repair complete?

Go to Step 14

Inspect the Brake system for Brake drag. Refer to Brakes Drag in Hydraulic Brakes.

Do any of the above conditions apply?

Go to Step 7

Go to Step 8

Repair/replace components as necessary.

Is the repair complete?

Go to Step 14

Inspect the steering gear valve for an unbalance.

If this is the cause, steering effort will be very light in the direction of the lead and effort will be heavy in the opposite direction with the vehicle parked on a smooth level surface.

Does the above condition apply?

Go to Step 9

Go to Step 10

Replace the steering gear valve. Refer to Steering Gear Valve Replacement - Off Vehicle in Power Steering Systems.

Is the repair complete?

Go to Step 14

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

Is the wheel alignment in specifications?

Go to Step 12

Go to Step 11

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

Is the repair complete?