Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #16-NA-130

2021 GMC Sierra 3500

TSB Document:

MC-10232711-0001.pdf

Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY

Summary: This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear.

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Date Published: MAR 02, 2023
NHTSA TSB #: 10232711

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