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February 19, 2021 Service bulletin

Revised Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14....

Freightliner technical service bulletin 20TS-07REV for 2020-2022 Freightliner Cascadia, 2020-2021 Western Star 4900 and 2020-2021 Western Star 4700 and others.

Bulletin number
20TS-07REV
Component
Engine and engine cooling
Summary
Revised 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.

Owners of these vehicles have filed 6 complaints in the engine category.

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