{"nhtsa_id":11023590,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-10-02","date":"2025-09-24","document_id":"08-318-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Amplifier (AMP) Diagnostic and System Updates Customers may experience 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. This bulletin involves updating the AMP with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023590-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023590-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023590","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2024,"year_to":2024,"match":"exact","vehicle_ids":["2024_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":[]}