Freightliner Cascadia 2017–2021 — technical service bulletin
Bulletin SB60-168 · NHTSA communication 10173898 · issued Apr 17, 2020
Technical service bulletin
communication type
Structure
component
2017–2021
model years
5
vehicle entries
Official summary
Service Bulletin for Installing Rain Gutters for Upper Door Seal Leaks. New Cascadia day cab vehicles with roof fairings may experience minor water leaks through the upper door seals. This issue can be minimized by regularly wiping down the door seals to keep them free of road grime. A rain gutter seal can also be installed above each door using a Cascadia tertiary seal (part number 18-63286-002).
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.