GMC TSB #21-NA-120

2020 GMC Sierra 3500

TSB Document:

Affected Component: EQUIPMENT

Summary
This service bulletin provides a Diagnostic Tip for Noise, Vibration, and/or Harshness Issues/Clunk Noise Heard During Coast Down Event after the transfer case was removed from the transmission and reinstalled during a recent repair.

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Date Published
SEP 19, 2023
NHTSA TSB #
10243980
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