Freightliner 122SD 2017–2020 — technical service bulletin
Bulletin CALFTL31-003 · NHTSA communication 10187594 · issued Feb 24, 2021
Technical service bulletin
communication type
Trailer Hitches
component
2017–2020
model years
8
vehicle entries
Official summary
Customer Advisory Letter for Cascadia, New Cascadia, and 122SD Vehicles with Cracked Fifth Wheel Angles
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.