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Service bulletin 121029

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 id10011663
Published by NHTSA2005-01-28
Manufacturer's number121029
Manufacturer's date2004-12-02
NHTSA componentSTRUCTURE:FRAME AND MEMBERS

NHTSA's summary

SERVICE REPLACEMENT INTERMEDIATE AND AFTER FRAME CROSSMEMBERS. CRACKS MAY DEVELOP IN THE CROSSMEMBER CENTER SECTIONS. MACK CV MODEL CHASSIS USED IN MIXER APPLICATIONS. *TT

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

Body and frame

Vehicles listed
UNKNOWN UNKNOWN

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