# Service bulletin WI20\-011

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: 10177653
- Published by NHTSA: 2020\-07\-28
- Manufacturer's number: WI20\-011
- Manufacturer's date: 2020\-07\-20
- NHTSA component: EQUIPMENT; ENGINE AND ENGINE COOLING

## NHTSA's summary

Warranty Information Letter for Detroit and TBB Parchment Format Update. In the continuing effort to standardize across brands, DTNA is pleased to announce that Detroit Diesel Corporation \(Detroit\) and Thomas Built Bus \(TBB\) parchments will be transitioned to the format used for Freightliner, Freightliner Custom Chassis Corporation \(FCCC\), and Western Star. DTNA's goal is to improve and align documentation but individual coverages have not changed. Updated parchments, also known as coverage sheets, will be published on a rolling basis.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177653-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177653-9999.pdf)

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

## Components

Engine, Equipment and accessories

## Vehicles listed

- 2010 to 2021 THOMAS BUILT BUSES MINOTOUR
- 2010 to 2021 THOMAS BUILT BUSES SAF\-T\-LINER C2
- 2010 to 2021 THOMAS BUILT BUSES SAF\-T\-LINER EFX
- 2010 to 2021 THOMAS BUILT BUSES SAF\-T\-LINER HDX

JSON: [/v1/bulletins/10177653](/v1/bulletins/10177653)

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