RAM 2500 2025–2026 — technical service bulletin
Bulletin 08-144-26 · NHTSA communication 11031321 · issued Apr 7, 2026
Technical service bulletin
communication type
Electrical System
component
2025–2026
model years
8
vehicle entries
Official summary
Global Telematics Box Module (TBM) Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ? B1560 - 11 Cellular Antenna 1 - short to
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.