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Service bulletin S9901

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 id605045
Published by NHTSA1999-05-24
Manufacturer's numberS9901
Manufacturer's date1999-04-08
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

NHTSA's summary

CONCERNS WITH FAST CYCLING OF COOLING SYSTEM FAN. *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

Engine, Cooling fan, Cooling system

Vehicles listed
BLUE BIRD BLUE BIRD1999
BLUE BIRD TC10001999
BLUE BIRD TC20001999

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