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Service bulletin K77864401

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 id10129917
Published by NHTSA2018-03-12
Manufacturer's numberK77864401
Manufacturer's date2018-01-04
NHTSA componentFUEL SYSTEM, DIESEL; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP; FUEL SYSTEM, GASOLINE

NHTSA's summary

Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After A Pump Failure or System Contamination.Removed Tech Tip, Added correct operation ID

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

Fuel system, Fuel pump

Vehicles listed
MACK ANTHEM (AN)2018 (the catalog's model; the bulletin names a series or trim of it)
MACK CXU
MACK CXU2006 to 2018
MACK GU
MACK GU2006 to 2018
MACK LEU2007 to 2017
MACK LR
MACK LR2010 to 2014
MACK LR2015, 2016, 2017, 2018
MACK MRU2007 to 2018
MACK TD
MACK TD2007 to 2018

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