Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #20NA082

2021 GMC Sierra 1500

TSB Document:

MC-10191202-9999.pdf

Affected Component: ENGINE AND ENGINE COOLING

Summary: This informational bulletin explains why more DEF is being used in diesel engines do to new emission standards.

Click a tab for more information.

Date Published: MAR 10, 2021
NHTSA TSB #: 10191202

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