C 2500 Yukon XL 2WD V8-8.1L VIN G (2002)
6. If movement exceeds 2 mm (0.078 in) replace the idler arm.
7. Install the dial indicator at the idler arm.
8. Push the tire inward slowly with one hand to remove any lash.
Zero out the dial indicator and pull outward in order to take a reading.