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Service bulletin FSB-593-013

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 id10055976
Published by NHTSA2014-08-07
Manufacturer's numberFSB-593-013
Manufacturer's date2014-05-01
NHTSA componentEQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

MACK TRUCK: THE GRADE GRIPPER FEATURE, ON SOME TRUCKS, ARE PRONE TO HARSH ENVIRONMENTS WITH INTERNAL CONTAMINATION, CAUSED BY BUILD UP OF GRIME, SALT, ROAD DEBRIS AND OTHER CONTAMINANTS. MODEL 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

Equipment and accessories

Vehicles listed
MACK CHU2006 to 2010
MACK CHU2013 to 2014
MACK CXU2006 to 2010
MACK GRANITE (GU)2012 to 2014
MACK GU2006 to 2011
MACK PINNACLE (CHU)2011 to 2012
MACK PINNACLE (CXU)2011 to 2015
MACK TD2010 to 2014

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