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Service bulletin 99066D

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 id628925
Published by NHTSA2002-03-25
Manufacturer's number99066D
Manufacturer's date2001-12-01
Replaces99066C
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

SOME OWNERS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE ORHARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INUJECTOR (SCPI) POPPET VALVE(S). *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 C SERIES1999 to 2000
CADILLAC C/K SERIES2000
CADILLAC K SERIES1999 to 2000
CHEVROLET C SERIES1996 to 2000
CHEVROLET G SERIES1996
CHEVROLET G SERIES1997 to 2000
CHEVROLET K SERIES1996 to 2000
CHEVROLET L SERIES1996 to 2000
CHEVROLET M SERIES1996 to 2000
CHEVROLET P SERIES1996 to 1999
CHEVROLET S SERIES1996 to 2000
CHEVROLET T SERIES1996
CHEVROLET T SERIES1997, 1998, 1999, 2000
CHEVROLET W41996, 1997, 1998, 1999, 2000
FORD L SERIES1996
FORD L SERIES1999
GMC C SERIES1996 to 2000
GMC G SERIES1996 to 2000
GMC K SERIES1996 to 2000
GMC L SERIES1997 to 1998
GMC L SERIES2000
GMC M SERIES1996 to 2000
GMC P SERIES1996 to 1999
GMC S SERIES1996 to 2000
GMC T SERIES1996
GMC T SERIES1997, 1998, 1999, 2000
GMC W41996, 1997, 1998, 1999, 2000
ISUZU NPR2000
OLDSMOBILE T SERIES1996 to 1998
OLDSMOBILE T SERIES2000

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
16-NA-3832024-07-16. Service bulletin. This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
16-NA-3832024-03-19. Service bulletin. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
22-NA-0742024-02-29. Service bulletin. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
PI1394B2024-02-02. Service bulletin. This PI bulletin advises the technician on the proper way to install the pistons in an engine.
1300890092023-12-11. Service bulletin. Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
23-NA-1532023-09-26. Service bulletin. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
18-NA-0732023-09-15. Service bulletin. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
22-NA-0092023-04-12. Service bulletin. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
21-NA-1242023-01-06. Service bulletin. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
22-NA-0742022-12-03. Service bulletin. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.