# Service bulletin KC\-131

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: 10203136
- Published by NHTSA: 2021\-11\-05
- Manufacturer's number: KC\-131
- Manufacturer's date: 2021\-10\-26
- NHTSA component: POWER TRAIN; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRONIC STABILITY CONTROL \(ESC\):CONTROL MODULE:SOFTWARE

## NHTSA's summary

Mack Chassis \- Differential Lock Status Alarm And Icon; Differential Lock Alarm Tone Does Not Sound For Entire Duration Of Differential Lock Engagement

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203136-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203136-9999.pdf)

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

## Components

Driver assistance, Electrical system, Transmission and driveline, Instrument cluster

## Vehicles listed

- MACK E\-TECH

JSON: [/v1/bulletins/10203136](/v1/bulletins/10203136)

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