Service bulletin Dealer Letter -

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

Field Update Notice #74B255 Detkroit Diesel Field Action 14M1 - Pierce has been notified by Detroit Diesel Corp that they determined that some certified GHG14 DD platform engines will require replacement of the DEF Pump Main Filter and DEF Dosing Unit inlet Screen. The DEF Pump Main Filter may not be seated properly in the DEF Pump. Unseated filters lead to blockage of the DEF Dosing Unit Inlet Screen with debris, and resulting fault codes may cause customer dissatisfaction.

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

Engine, Fuel system, Fuel filter

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

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