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Service bulletin 990601010

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 id606086
Published by NHTSA1999-08-06
Manufacturer's number990601010
Manufacturer's date1999-06-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

SOME CUSTOMERS MAY COMPLAIN ABOUT A ENGINE COLD / KNOCK / TICK NOISE. *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

Vehicles listed
CADILLAC ALLANTE1993
CADILLAC DEVILLE1993, 1994, 1995, 1996, 1997, 1998, 1999
CADILLAC ELDORADO1993, 1994, 1995, 1996, 1997, 1998, 1999
CADILLAC SEVILLE1993, 1994, 1995, 1996, 1997, 1998, 1999
OLDSMOBILE AURORA1995, 1996, 1997, 1998, 1999

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

Recalls for the same vehicles and component
19971881997-10-29. Engine
19941401994-09-06. Engine
19931381993-10-04. Engine

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
1300890092023-12-11. Service bulletin. Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
39512006-11-20. Service bulletin. KNOCKIG NOISES OR EXCESSIVE OIL CONSUMPTION. VEHICLES WITH LD8 OR L37 4.6L V8 ENGINES. *KB
36122006-01-06. Service bulletin. ENGINE LIFTER TICK NOISE. *TT
073020042005-04-11. Service bulletin. ENGINE FUEL RAIL REPLACEMENT. *EH
0406050082005-02-14. Service bulletin. AVAILABILITY OF EXHAUST MUFFLER FOR SERVICE. *TT
30352004-10-14. Service bulletin. SERVICE ENGINE SOON (SES) LIGHT ON, SES LIGHT ON AND CHUGGLE OR SURGE. DIAGNOSTIC TROUBLE CODE P0741 (TCC STUCK OFF). *TT
091320022004-09-30. Service bulletin. THIS MESSAGE CONCERNS INSIDE AIR TEMPERATURE SENSOR NOISY. COMMENTS THAT A NOISE IN THE LEFT SIDE OF THE INSTRUMENT PANEL ON COLD STARTS. THIS NOISE MAY BE DESCRIBED AS A GRIND, GROWL, HUM, WHINE OR SQUEAL. A FAN NOISE MAY ALSO BE HEARD WHILE DRIVING. THIS CONDITION MAY BE CAUSED BY THE INSIDE AIR TEMPERATURE SENSOR. *TT
021032004-07-09. Service bulletin. 4T80E MH1 SERVICE ENGINE SOON (SES) LIGHT ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0741 (TCC STUCK OFF). *TT
017922004-04-28. Service bulletin. 4.0L L47, 4.6L LD8 L37 ENGINE WATER PUMP COVER P/N 12571913- THERMOSTAT LOOSE. ALSO INCLUDING MODEL 2003 CADILLAC ELDORADO. *MR
017712004-04-28. Service bulletin. 4.0L L47, 4.6L LD8, L37, LH2 ENGINE COOLANT OR OIL LEAK.*MR