Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #21NA007

2021 GMC Sierra 1500

TSB Document:

MC-10187770-9999.pdf

Affected Component: ELECTRICAL SYSTEM

Summary: This technical bulletin provides a procedure to program the reductant fluid module if found the cause of the customers concern.

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Date Published: JAN 20, 2021
NHTSA TSB #: 10187770

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