Freightliner Cascadia 2019–2025 — technical service bulletin
Bulletin FAB337 · NHTSA communication 11012394 · issued Dec 4, 2024
Technical service bulletin
communication type
Electrical System
component
2019–2025
model years
7
vehicle entries
Official summary
FAB 337 for 4th and Fifth Gen Cascadia RP1226 - Progressive Low Voltage Disconnect (PLVD)
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.