Freightliner Cascadia 2019–2022 — technical service bulletin
Bulletin CALFTL40-001 · NHTSA communication 10191146 · issued Apr 23, 2021
Technical service bulletin
communication type
Tires
component
2019–2022
model years
4
vehicle entries
Official summary
Customer Advisory Letter for Tire Valve Stem Inspection.
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.