Freightliner Cascadia 2017–2019 — technical service bulletin
Bulletin CALFTL54-004 · NHTSA communication 10189619 · issued Mar 26, 2021
Technical service bulletin
communication type
Electrical System
component
2017–2019
model years
3
vehicle entries
Official summary
Customer Advisory Letter for Customer Access to Fused Battery Power and Ground inside a Cascadia Cab vehicles built without a cab load disconnect switch (CLDS).
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.