Jeep Grand Cherokee 2025 — technical service bulletin
Bulletin 08-240-26 · NHTSA communication 11034317 · issued Jun 16, 2026
Technical service bulletin
communication type
Electrical System
component
2025
model years
3
vehicle entries
Official 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.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.