Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #22-NA-085

2021 GMC Sierra 1500

TSB Document:

MC-10210852-0001.pdf

Affected Component: EQUIPMENT

Summary: This service bulletin provides radio software version 135120 (IOR) update procedures to correct customer concerns of software related issues.

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Date Published: APR 22, 2022
NHTSA TSB #: 10210852

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