Is your defective GMC Sierra 1500 actually a LEMON?

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GMC TSB #PIT5734F

2021 GMC Sierra 1500

TSB Document:

MC-10240778-9999.pdf

Affected Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

Summary: This Preliminary information communicates an issue with poor heater performance and advises dealerships to inspect the heater core inlet and outlet hoses for being twisted or kinked.

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Date Published: JUL 05, 2023
NHTSA TSB #: 10240778

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