Is your defective GMC Sierra 2500 actually a LEMON?

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GMC TSB #19NA237

2021 GMC Sierra 2500

TSB Document:

MC-10183176-9999.pdf

Affected Component: EQUIPMENT

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

Click a tab for more information.

Date Published: OCT 27, 2020
NHTSA TSB #: 10183176

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