Freightliner Cascadia 2015–2020 — technical service bulletin
Bulletin SS1034544 · NHTSA communication 10214910 · issued Jun 30, 2022
Technical service bulletin
communication type
Electrical System
component
2015–2020
model years
6
vehicle entries
Official summary
Service Solution for SSAM Fault 520197/31 - MQ SwitchMalfunction Troubleshooting
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.