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Service bulletin FSB 284-056

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 id10081447
Published by NHTSA2016-10-04
Manufacturer's numberFSB 284-056
Manufacturer's date2015-04-23
NHTSA componentENGINE

NHTSA's summary

ENGINE HARNESS CHANGES. MACK TRUCKS HAS RELEASED A NEW ENGINE HARNESS FOR MP7 AND MP8 US2014 EMISSION ENGINES IN 2015 MODEL YEAR VEHICLES.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
MACK CHU2015
MACK CXU2015
MACK GU2015
MACK LEU2015
MACK MRU2015

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