# Service bulletin D20M4REV1

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: 10176738
- Published by NHTSA: 2020\-06\-26
- Manufacturer's number: D20M4REV1
- Manufacturer's date: 2020\-06\-25
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

Revision for DDC Field service campaign for GHG17 Detroit DD13 engines requiring software reprogramming and new emission label replacement. This field service applies only to MCI \(Motor Coach Industries\) vehicles. Several sections were corrected for missing or incomplete information.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176738-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10176738-9999.pdf)

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

## Components

Electrical system, Engine, Equipment and accessories, Software

## Vehicles listed

- DETROIT DIESEL DD13

JSON: [/v1/bulletins/10176738](/v1/bulletins/10176738)

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