Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #21NA238

2021 GMC Sierra 3500

TSB Document:

MC-10205564-9999.pdf

Affected Component: EQUIPMENT ADAPTIVE/MOBILITY

Summary: This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.

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Date Published: NOV 09, 2021
NHTSA TSB #: 10205564

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