WenmarOpen by Wenmar Pro

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10197422
Published by NHTSA2021-06-14
Manufacturer's numberDealer Letter -
Manufacturer's date2014-07-29
NHTSA componentFUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT

NHTSA's summary

Field Update Notice #74B251 Detroit Diesel Field Action 14W1 - Pierce has been notified by Detroit Siesel Corporation (DDC) that they determined that some certified GHG14 DD platform engines will require software and fuel maps to be reprogrammed on affectd engines in order to prevent fault codes and performance issues that may result in customer dissatisfaction.

The document

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, Equipment and accessories, Fuel system

Vehicles listed
PIERCE PIERCE

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