Freightliner Cascadia 2019–2020 — technical service bulletin
Bulletin CALFTL42001 · NHTSA communication 10165593 · issued Oct 2, 2019
Technical service bulletin
communication type
Equipment
component
2019–2020
model years
2
vehicle entries
Official summary
Customer Advisory Letter for WABCO HP Air Dryer Turbo Cut-Off Valve Replacement
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.