# 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: 11018135
- Published by NHTSA: 2025\-05\-08
- Manufacturer's number: M1391A
- Manufacturer's date: 2025\-04\-22
- NHTSA component: ELECTRICAL SYSTEM; UNKNOWN OR OTHER

## NHTSA's summary

SERVICE BULLETIN M1391A \(REV S\): MIDTRONICS GRX\-3110 AND DCA\-8000 SOFTWARE UPDATE. The purpose of this bulletin is to inform the dealer network that a software update to the GRX\-3110 and DCA\-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER SYSTEM \(PART NUMBER: DCA\-8000\). Updated: Bulletin title name. Rev S. Added: 192\-210335O and section. Updated: New Software Update and DCA\-8000.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018135-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018135-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- HARLEY\-DAVIDSON AMERICANA

JSON: [/v1/bulletins/11018135](/v1/bulletins/11018135)

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