Service bulletin TSB110181-052420
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 | 10162091 |
| Published by NHTSA | 2019-07-08 |
| Manufacturer's number | TSB110181-052420 |
| Manufacturer's date | 2019-05-24 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
This Technical Service Bulletin describes the verification and resolution of engine speed instability related to truck vacuum blower or pump engagement. Some units with transfer cases have exhibited engine speed instability when the vacuum blower or pump is engaged. New engine control module software can address most of these issues. This is an update to a previously submitted communication.
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
| CUMMINS ISL9 | |
|---|---|
| CUMMINS ISX11.9 | |
| CUMMINS ISX12 | |
| CUMMINS ISX15 | |
| CUMMINS X12 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.