Freightliner Cascadia 2019–2026 — technical service bulletin
Bulletin CXA 04_26_Side Guard · NHTSA communication 11031981 · issued Apr 16, 2026
Technical service bulletin
communication type
Lane Departure
component
2019–2026
model years
8
vehicle entries
Official summary
CX Advocate for P4 Side Guard Assist On/Off Menus and Trailer Functionality (TSB-54-381-FTL)
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.