Freightliner Cascadia 2020–2024 — technical service bulletin
Bulletin CALFTL54-031 · NHTSA communication 10243335 · issued Sep 12, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2024
model years
5
vehicle entries
Official summary
Customer Advisory Letter for Towing Related to Low Coolant Faults
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.