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Service bulletin PI-0684

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 id10033634
Published by NHTSA2010-08-30
Manufacturer's numberPI-0684
Manufacturer's date2009-07-10
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; UNKNOWN OR OTHER

NHTSA's summary

MACK: LOW NOX IDLE, DOES NOT FUNCTION WITH HAND THROTTLE. THE ELECTRONIC HAND THROTTLE ON CERTAIN CHU, CXU, GU AND TD MODEL CHASSIS WHEN ENGAGED, WILL OVERRIDE THE LOW NOX IDLE COMPLIANCE. A LIST OF AFFECTED CHASSIS HAS BEEN SENT TO ALL APPLICABLE DEALERS. *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

Electrical system, Software

Vehicles listed
MACK CHU2008 to 2009
MACK CXU2008 to 2009
MACK GU2008 to 2009
MACK TD7142008 to 2009

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