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Service bulletin SB 234022

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 id10025563
Published by NHTSA2008-08-21
Manufacturer's numberSB 234022
Manufacturer's date2008-05-29
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

INTERFERENCE BETWEEN EXHAUST PIPE U-BOLT AND SLEEPER RAIL. (NOT APPLICABLE TO MACK TRUCKS AUSTRALIA). *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

Engine, Exhaust and emissions

Vehicles listed
MACK CHU2007 to 2008
MACK CXU2006 to 2008

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