Is your defective GMC Sierra 3500 actually a LEMON?

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GMC TSB #PIT5868B

2021 GMC Sierra 3500

TSB Document:

MC-10231649-9999.pdf

Affected Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

Summary: This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core.

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Date Published: JAN 17, 2023
NHTSA TSB #: 10231649

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