Is your defective GMC Sierra 2500 actually a LEMON?

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GMC TSB #21-NA-199

2021 GMC Sierra 2500

TSB Document:

MC-10217111-0001.pdf

Affected Component: POWER TRAIN

Summary: This informational bulletin advises the technician to replace the TBV if the transmission has any type of repair even if no problem was found, to replace the tbv.

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Date Published: JUL 26, 2022
NHTSA TSB #: 10217111

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