RAM 2500 2026 — technical service bulletin
Bulletin 08-315-26 · NHTSA communication 11036352 · issued Aug 20, 2026
Technical service bulletin
communication type
Structure
component
2026
model years
4
vehicle entries
Official summary
Flash: Integrated Trailer Control Module (ITCM) Update Customers may experience the following: SYMPTOM: ● 'Check Trailer Turn Lamp' message in the Instrument Panel Cluster (IPC) with no trailer connected. This bulletin involves inspecting and possibly reprogramming the ITCM with the latest software.
Vehicles covered
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.