GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Knocking or clunking noise occurs when operating the vehicle in high gear or coasting in neutral at 16 km/h (10 mph).

The universal joint is worn or damaged.

Replace the worn or damaged universal joint. Refer to Universal Joint Replacement

The side gear hub counterbore in the differential is worn oversize.

Replace the differential case and/or the side gears.