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Service bulletin sb2028

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 id10141672
Published by NHTSA2018-06-18
Manufacturer's numbersb2028
Manufacturer's date2018-02-26
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

sb2028 Engine Coolant Changes

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FREIGHTLINER BUSINESS CLASS1991 to 2003
FREIGHTLINER BUSINESS CLASS M22004 to 2007
FREIGHTLINER BUSINESS CLASS M2 106V2005 to 2007
FREIGHTLINER CENTURY CLASS1997 to 2007
FREIGHTLINER CONVENTIONAL1990 to 2007
FREIGHTLINER FLB1991 to 1996
FREIGHTLINER FLB1998 to 2000
FREIGHTLINER FLB2001
FREIGHTLINER FLD2004 to 2007

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

Other bulletins for the same vehicles and component
sb20322018-06-18. Service bulletin. sb2032 Gates PowerGrip Hose Clamps, Replacement
sb20312018-06-18. Service bulletin. sb2031 Horton Fan Clutches with 32-Inch Fans
sb20242018-06-18. Service bulletin. sb2024 Horton Fan Clutch Changes