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Service bulletin FSB-364-037

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 id10056632
Published by NHTSA2015-01-21
Manufacturer's numberFSB-364-037
Manufacturer's date2014-09-01
NHTSA componentELECTRONIC STABILITY CONTROL (ESC); ELECTRICAL SYSTEM; TRAILER HITCHES:FIFTH WHEEL ASSEMBLY

NHTSA's summary

MACK: WHEN THE OUTPUT FROM THE VECU GETS SHORTED OUT TO GND, THERE IS NO WARNING AND CAUSES 5TH WHEEL TO SLIDE WITHOUT ACTIVATING 5TH WHEEL SLIDE SWITCH AND NEEDS TO BE REPROGRAM. MODEL 2010-2014 CHU, CXU, GU, TD. *PE

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

Driver assistance, Electrical system, Trailer hitch

Vehicles listed
MACK CHU2010
MACK CHU2013 to 2014
MACK CXU2010
MACK GRANITE (GU)2012 to 2014
MACK GU2010 to 2011
MACK PINNACLE (CHU)2011 to 2012
MACK PINNACLE (CXU)2011 to 2014
MACK TD2010 to 2014

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