Freightliner 114SD 2020–2021 — technical service bulletin
Bulletin D20M3 · NHTSA communication 10176737 · issued Jun 25, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2021
model years
8
vehicle entries
Official summary
Detroit Field Service campaign for DETROIT Export DD15 and DD13 Valve Lash Adjustment, Throttle Connector O-ring, and TC Air Line Spacer Installation.
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.