Service bulletins for the 2021 Jeep Grand Cherokee
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.
1325 on file from NHTSA, as of 2026-10-19.
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By component
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Only bulletins with component: A/C compressor are shown. Show all
| 0804322REVA | 2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR:MODULE (ACCM). Flash: Heating Ventilation and Air Conditioning (HVAC) Updates This bulletin involves reprogramming the HVAC module with the latest available software. Customers may experience the following:High pitch whistle coming from the dash when the blower motor is turned on.High pitch whistle originated from the defroster door when the HVAC unit in either Hi-Level (panel and defrost) or Bi-Level (panel and floor) modes. May be worsened when running the front airflow at blower bar 1-2 and rear airflow at blower bar 5-7. |
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| Z33Revision1 | 2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR:MODULE (ACCM). Customer Satisfaction Notification Z33 Heating Ventilation AC Module |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.