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Service bulletin 0921

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 id635303
Published by NHTSA2002-10-21
Manufacturer's number0921
Manufacturer's date2002-05-01
Replaces0921
NHTSA componentFUEL SYSTEM, GASOLINE:CARBURETOR SYSTEM

NHTSA's summary

SUBJECT REGARDING DEEP SUMP COVER ASSEMBLY KIT FOR VEHICLES BUILT PRIOR TO FEBRUARY 19, 2001, WITH SMALL AMOUNT OF WATER COLLECTING IN THE LOWEST PORTION OF THE AIR CLEANER COVER AND NOT DRAINING EFFECTIVELY THROUGH THE VACUATOR VALVE. *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

Fuel system

Vehicles listed
FREIGHTLINER BUSINESS CLASS

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