# Service bulletin 21TS\-12REV

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: 10203757
- Published by NHTSA: 2021\-12\-02
- Manufacturer's number: 21TS\-12REV
- Manufacturer's date: 2021\-11\-15
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Revised Detroit Technical Service Letter for Gen 5 Detroit DD16 Poor Acceleration Complaints In Western Star 49X Chassis When Lightly Loaded. This letter has been removed as more current information is now available in the campaign letter D21M7.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203757-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203757-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2021 to 2022 WESTERN STAR 49X

JSON: [/v1/bulletins/10203757](/v1/bulletins/10203757)

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