{"nhtsa_id":11023583,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-10-02","date":"2025-09-23","document_id":"08-311-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Not applicable to vehicles built for US market. Flash: Amplifier (AMP) Diagnostic and System Updates Customers may experience one or more of the following: ● **Droning noises coming out of the speakers at specific RPMs that range from 1200 to 1800 RPM. Probability of occurence is most likely during cold ambient temperatures.** ● High pitched noise at start up or idle under cold conditions. This bulletin involves updating the AMP with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023583-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023583-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023583","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_grand-cherokee-l"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}