Service bulletin SF533A-O

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.

NHTSA's summary

Instrument Cluster Update: Certain Cummins equipped vehicles with alternators capable of producing in excess of 160 amps, the truck voltage may increase immediately after the Cummins grid heater cycles off, causing the ICU3S display to reset (looks like the reset that occurs during ignition key on). After reset, the ICU will resume normal function.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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