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Service bulletin SB121024

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 id614515
Published by NHTSA2000-10-25
Manufacturer's numberSB121024
Manufacturer's date2000-08-02
ReplacesSB121024
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

IN CERTAIN SEVERE OPERATING CONDITIONS, CRACKS MAY DEVELOP IN THE BACK-OF-CAB CROSSMEMBER ON MODEL CHASSIS. *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
MACK CL
MACK RD

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