# Service bulletin CALFTL32\-003

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: 10172590
- Published by NHTSA: 2020\-03\-23
- Manufacturer's number: CALFTL32\-003
- Manufacturer's date: 2020\-03\-18
- NHTSA component: SUSPENSION

## NHTSA's summary

Customer Advisory Letter for Airliner 21K Lightweight Extra Duty Rear Suspension Height Control Valve Installation. The rear suspension height control valve and linkage installation on these 15 vehicles will need to be corrected using the following work instructions.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172590-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172590-9999.pdf)

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

## Components

Suspension

## Vehicles listed

- 2021 FREIGHTLINER BUSINESS CLASS M2

JSON: [/v1/bulletins/10172590](/v1/bulletins/10172590)

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