Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #PIP5874A

2023 GMC Sierra 3500

TSB Document:

MC-10231619-9999.pdf

Affected Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

Summary: This Preliminary information communicates that the exhaust backpressure valve is on a parts restriction.

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Date Published: JAN 04, 2023
NHTSA TSB #: 10231619

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