Freightliner Cascadia 2017–2021 — technical service bulletin
Bulletin CALABSMODVALVE · NHTSA communication 10174987 · issued May 13, 2020
Technical service bulletin
communication type
Service Brakes, Air
component
2017–2021
model years
5
vehicle entries
Official summary
Customer Advisory Letter for ABS Modulator Valve Replacement. DTNA has decided to remove and replace the ABS modulator valves as part of an ongoing supplier quality study.
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.