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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: Software are shown. Show all

Bulletins, newest first
TechTalk77862020-11-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; FORWARD COLLISION AVOIDANCE; LANE DEPARTURE. Tech Talk discussion on p4 gcw04t flashed to 19.45.1. Forward and lane camera not detected.
TechTalk77852020-11-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Tech Talk discussion on DL8 CGW connection issues for D20M8.
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.
17TS-05REV22020-10-21. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Revised Technical Service Letter for Detroit DT12 TCM GHG17 Only; Bootloader Update. On Detroit DT12 equipped vehicles, it may be necessary to complete an additional step in the programming process when updating the TCM software.
CTP Letter2020-09-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Customer Letter explaining for certain vehicles the software updates for the CTP will require monitoring and may affect service availability.
D20M8REV12020-08-29. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Revised Detroit Field Service Campaign for GHG17 & GHG21 Detroit DD13, DD15, and DD16 ACM Software Reprogramming. NOTE: Reference 20TS-04 – Detroit™ CPC501T GHG21 Only; Bootloader Update if New Cascadia CPC501T is not at the software level shown in this table.
D20M82020-08-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Detroit Field Service Campaign for GHG17 & GHG21 Detroit DD13, DD15, and DD16 ACM Software Reprogramming
20TS-042020-05-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Technical Service Letter for Detroit CPC501T GHG21 Only; Bootloader Update. On Detroit powertrain equipped Cascadias, built in 2020, it may be necessary to complete an additional step in the programming process when updating the CPC501T software.
20CSA-032020-03-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Customer Service Announcement saying that Service Pack (SP) 2 for Diagnostic Link 8.11 Standard and Professional will be available for download from the Detroit Diesel server.
SB54-2392019-11-20. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ELECTRICAL SYSTEM. Service Bulletin for Cascadia Cabin CAN ECU Compatibility. Compatible software levels are required for the proper operation of the vehicle.
19TL-212019-10-28. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Tool Letter announcing an ICC5 programming cable will be available once new programming software is finalized.
D19R32019-10-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. DDC Emission Recall for GHG17 DD Platform Model Years 2019 Software Reprogramming
ICI19-016 SF5602019-06-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Revised Bulletin
sb543082019-06-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. sb54308 Chassis ECU Programming

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