# Service bulletin 21TS\-14REV1

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: 10241564
- Published by NHTSA: 2023\-09\-02
- Manufacturer's number: 21TS\-14REV1
- Manufacturer's date: 2023\-08\-11
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Revised Detroit Technical Service letter for Gen 5 DD15 Exhaust Valve Adjusting Screw Excessive Wear \& Increased Engine Idle Speed w/ DiagnosticLink Routine Impact being superceded by 23TS\-07

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241564-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241564-9999.pdf)

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

## Components

Engine

## Vehicles listed

- DETROIT DIESEL DETROIT DIESEL

JSON: [/v1/bulletins/10241564](/v1/bulletins/10241564)

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