# Service bulletin SB 3127

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: 10167368
- Published by NHTSA: 2019\-11\-08
- Manufacturer's number: SB 3127
- Manufacturer's date: 2019\-10\-07
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This Service Bulletin informs owners of model year 2019 D45CRTLE and J4500 model coaches equipped with a Delco 55 alternator, MCI P/N: 07\-03\-1322, to clean the alternators and reapply corrosion inhibitor every 6000 miles, using the following procedure as recommended by Delco.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10167368-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10167368-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2019 MCI D4505
- 2019 MCI J4500

JSON: [/v1/bulletins/10167368](/v1/bulletins/10167368)

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