# Service bulletin M1391A

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: 10168818
- Published by NHTSA: 2019\-12\-05
- Manufacturer's number: M1391A
- Manufacturer's date: 2019\-11\-04
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

SERVICE BULLETIN M1391A: MIDTRONICS GRX\-3110 SOFTWARE UPDATE. PURPOSE: REVISION. This bulletin is to inform the dealer network that a software update to the GRX\-3110 is now available. HD BATTERY DIAGNOSTIC STATION \(PART NUMBER: GRX\-3110HD\). Update 192\-210335I addresses the additional part numbers for batteries.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10168818-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10168818-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- HARLEY\-DAVIDSON HARLEY\-DAVIDSON

JSON: [/v1/bulletins/10168818](/v1/bulletins/10168818)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20M1391A&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10168818&vehicle=Service%20bulletin%20M1391A)