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Service bulletin 593-014-01

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 id10057176
Published by NHTSA2015-04-23
Manufacturer's number593-014-01
Manufacturer's date2014-12-01
NHTSA componentELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL

NHTSA's summary

MACK TRUCKS: GRADE GRIPPER REPLACEMENT FOR TRUCK MODELS; MACK, CHU, CXU AND GU FOR THE FOLLOWING YEARS 2008-2015. THE FOLLOWING TRUCKS MAY ALSO EXPERIENCE SLOW RELEASE OF THE BRAKES. *LJ

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

Electrical system

Vehicles listed
MACK CHU2008 to 2010
MACK CHU2013 to 2015
MACK PINNACLE (CHU)2011 to 2012

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