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Service bulletins for the 2020 Freightliner Cascadia

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

661 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Automatic transmission are shown. Show all

Bulletins, newest first
TechTalk81342021-04-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Tech Talk continuing discussion on SCR conversion codes only when bobtailing.
20TS-072020-10-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING. Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on GHG17/21 DD13 trucks built after June 5th 2019. This is due to a calibration issue in the current MCM software (14.1.1.5 or 14.2.1.3). New software is scheduled for release in the first quarter of 2021 that will address these faults.
sb2652 DT12 PTO2019-04-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT; ELECTRICAL SYSTEM:WIRING; EQUIPMENT ADAPTIVE/MOBILITY. DT12 PTO Upfit
DOC-10341662019-04-08. Service bulletin. EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT ADAPTIVE/MOBILITY. SS 1034166 New Cacadia With Cummins Engine and Eaton UltraShift PTO Engagement

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.