Freightliner Cascadia 2017–2020 — technical service bulletin
Bulletin SB54-309 · NHTSA communication 10169528 · issued Dec 19, 2019
Technical service bulletin
communication type
Exterior Lighting
component
2017–2020
model years
4
vehicle entries
Official summary
Service Bulletin for Replacing Halogen Headlamps on New Cascadia Vehicles.
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.