Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #14-06-04-004H

2021 GMC Sierra 3500

TSB Document:

MC-10212908-0001.pdf

Affected Component: ENGINE AND ENGINE COOLING

Summary: This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.

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Date Published: MAY 12, 2022
NHTSA TSB #: 10212908

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