Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #23-NA-032

2021 GMC Sierra 3500

TSB Document:

MC-10233347-0001.pdf

Affected Component: ENGINE AND ENGINE COOLING

Summary: The informational bulletin advises the tech to use the glow plug bore cleaner to reduce the chance of soot building up on the glow plug causing a premature failure.

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Date Published: MAR 06, 2023
NHTSA TSB #: 10233347

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