GM Service Manual Online
For 1990-2009 cars only

Possible Cause

Action

Worn front shock absorbers

Replace the shock absorbers.

Worn ball joints

Replace the ball joints.

Incorrectly adjusted or worn wheel bearings

Adjust or replace the wheel bearings and the races.

Wheel and tire are out of balance

Balance the wheel and the tire.

Excessive tire or wheel runout

Check and compensate for runout.