Is your defective GMC Sierra 1500 actually a LEMON?

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TSB Document:

Affected Component: UNKNOWN OR OTHER

Summary
Service Update- Certain vehicles may experience a Malfunction Indicator Lamp (MIL). Transmission shift quality may be impacted. Dealers are to replace the Transmission Control Module.

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Date Published
JAN 11, 2023
NHTSA TSB #
10229674
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