Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #19-NA-237

2021 GMC Sierra 1500

TSB Document:

MC-10222781-0001.pdf

Affected Component: FUEL SYSTEM, DIESEL

Summary: This informational bulletin explains how to identify possible DEF contamination.

Click a tab for more information.

Date Published: SEP 12, 2022
NHTSA TSB #: 10222781

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