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Service bulletin 99T33

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 id607595
Published by NHTSA1999-09-29
Manufacturer's number99T33
Manufacturer's date1999-08-01
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

CONDITIONS WITH WHISTLING NOISE AT HIGHWAY SPEEDS WITH HEATER / VENTILATION / AIR CONDITION (HVAC) SYSTEM IN RECIRCULATION MODE. *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

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
SATURN S-SERIES1997 to 1999

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