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Service bulletins for the 2021 Chevrolet Corvette

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

770 on file from NHTSA, as of 2026-10-19.

By type

By component

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
22-NA-0412023-10-25. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of Air Conditioning Not Blowing Cold Air.
N23-2410102023-06-24. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. (There may be future updates under this same release number.) Your Chevrolet Corvette keeps getting better. This vehicle software update includes the following: Refinements: Updates made to the overall vehicle software update process. Updates made to the air conditioning system to maintain consistent cooling performance. Updates made to the radio display graphics and audio connectivity while using OnStar & SiriusXM. Updates made to the headlamp functionality to improve the ease of use. A variety of other minor software updates to make your driving and in-vehicle experience better. Better Never Stops™
22-NA-0412023-03-03. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. This service bulletin provides repair information to correct a customer concern of Air Conditioning Not Blowing Cold Air.
PIC6447A2022-08-15. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates information to dealership technicians on diagnosing and repairing a water leak into the passenger side carpeting area after the AC has been used.
12-01-37-001F2022-07-12. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service.
PIP5786A2021-04-19. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR. This Preliminary information communicates I vehicle may come in with a need to test the EVAP system for a leaks. CH-52519 modification

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.