Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

8) - This step inspects for the transfer case causing the clunk. Shift the transfer case into another mode. If the transmission is causing the clunk, there is not be a change.
11) - This step inspects for the dual mass flywheel causing the clunk. A clunk from the dual mass flywheel would also be present in neutral.

Fig 1: Clunk On Acceleration Or Deceleration Diagnosis (Steps 1-11)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Clunk On Acceleration Or Deceleration Diagnosis (Steps 12-13)

Courtesy of GENERAL MOTORS CORP.