# Service bulletin WI21\-002

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: 10185687
- Published by NHTSA: 2021\-01\-22
- Manufacturer's number: WI21\-002
- Manufacturer's date: 2021\-01\-18
- NHTSA component: ENGINE AND ENGINE COOLING; POWER TRAIN; ELECTRICAL SYSTEM

## NHTSA's summary

Warranty Information Letter for Proterra Electric Powertrain Extended Warranty on TBB Electric Vehicles and FCCC Electric School Bus Chassis. Please be aware that for TBB electric vehicles and Freightliner Custom Chassis Corporation \(FCCC\) electric school bus chassis spec’d with a Proterra electric powertrain, extended warranty coverage will be offered by Proterra, not DTNA.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185687-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185687-9999.pdf)

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

## Components

Electrical system, Engine, Transmission and driveline

## Vehicles listed

- 2021 to 2022 THOMAS BUILT BUSES SAF\-T\-LINER C2

JSON: [/v1/bulletins/10185687](/v1/bulletins/10185687)

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