Freightliner Cascadia 2019–2020 — technical service bulletin
Bulletin CAL 540 Radios · NHTSA communication 10164492 · issued Sep 8, 2019
Technical service bulletin
communication type
Electrical System
component
2019–2020
model years
2
vehicle entries
Official summary
Some 540 model radios are experiencing issue related to volume control and other controls.
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.