Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #21NA256

2021 GMC Sierra 1500

TSB Document:

MC-10207916-9999.pdf

Affected Component: EXTERIOR LIGHTING

Summary: This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.

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Date Published: DEC 13, 2021
NHTSA TSB #: 10207916

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