{"nhtsa_id":11034317,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-02","date":"2026-06-16","document_id":"08-240-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Trailer Tow Module (TTM) Updates Customers may comment on one or more of the following: SYMPTOM: ● If the vehicle is traveling at less than 05 kph (03 mph) and the brake pedal is pressed, then both trailer turn lights will flash for two milliseconds. ● If the vehicle is traveling at less than 05 kph (03 mph) and one turn light is activated, then the opposite trailer turn light will flash for 20 milliseconds. This bulletin involves reprogramming the TTM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034317-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034317-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11034317","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_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":[]}