Service bulletin D21M7
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10203758 |
| Published by NHTSA | 2021-12-02 |
| Manufacturer's number | D21M7 |
| Manufacturer's date | 2021-11-11 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
Detroit Field Service Campaign for GHG21 Detroit DD16® CPC Software Reprogramming. All the vehicles in the population require programming the CPC. Some vehicles require programming the ACM, MCM, and TCM (if equipped with a Detroit DT12 transmission) to Model Year 2021 for compatibility. Please refer to the attached work instructions for MINIMUM software versions.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| WESTERN STAR 49X | 2021 to 2022 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.