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Service bulletin 990730016A

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 id10007838
Published by NHTSA2004-07-13
Manufacturer's number990730016A
Manufacturer's date2002-10-01
Replaces990730016B
NHTSA componentPOWER TRAIN

NHTSA's summary

DIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING 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

Transmission and driveline

Vehicles listed
CADILLAC ESCALADE1999, 2000
CADILLAC ESCALADE2002, 2003
CHEVROLET ASTRO1988 to 2003
CHEVROLET BLAZER1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
CHEVROLET EXPRESS1996
CHEVROLET EXPRESS1997, 1998, 1999, 2000, 2001, 2002, 2003
CHEVROLET S101988 to 2003
CHEVROLET SILVERADO1988 to 1998
CHEVROLET SILVERADO1999, 2000, 2001, 2002, 2003
CHEVROLET SUBURBAN1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
CHEVROLET TAHOE1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
CHEVROLET TRACKER1989 to 1994
CHEVROLET TRACKER1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
GMC ENVOY1999 to 2001
GMC S151988 to 1994
GMC SAFARI1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
GMC SAVANA1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
GMC SIERRA1988
GMC SIERRA1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
GMC SONOMA1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
GMC SUBURBAN1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
GMC YUKON1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
HUMMER H22003
OLDSMOBILE BRAVADA1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001

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

Recalls for the same vehicles and component
05V0050002005-01-07. POWER TRAIN:DRIVELINE:DRIVESHAFT
03V0750002003-03-06. POWER TRAIN:AUTOMATIC TRANSMISSION
20030482003-02-25. Powertrain
19960401996-02-28. Powertrain
96V0350001996-02-22. POWER TRAIN:MANUAL TRANSMISSION
95V1390001995-07-26. POWER TRAIN:AUTOMATIC TRANSMISSION
95V0260001995-02-16. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
94V0930001994-05-16. POWER TRAIN:AUTOMATIC TRANSMISSION
19931411993-10-14. Powertrain
93V0160001993-02-01. POWER TRAIN:AUTOMATIC TRANSMISSION

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
24-NA-1412024-08-15. Service bulletin. GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
PI1394B2024-02-02. Service bulletin. This PI bulletin advises the technician on the proper way to install the pistons in an engine.
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.
PIP5640A2022-10-17. Service bulletin. This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.
06-00-89-031H2022-10-11. Service bulletin. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
22-NA-1812022-09-19. Service bulletin. This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the engine or transmission.
06-00-89-031D2021-09-07. Service bulletin. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
06-00-89-031D2021-04-20. Service bulletin. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
PIP4379N2018-10-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have not engagement into drive, delayed, no engagement into reverse, and or a range inhibit. Technician may find Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. Technician should follow published Service Information diagnostics for Diagnostic Trouble Code P0701 first. Technician will also ensure the fluid level is at the top of the hot band when the transmission fluid temperature is 175° Fahrenheit. Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 can set by the following fluid service/filter change, transmission service involving removing the pan, low fluid level caused by leaks, or after long periods of storage. If the fluid level has been properly checked using the HOT check procedure listed in Service Information document 2408059 and any of the Diagnostic Trouble Codes reset during a cold start inspect the internal suction filter for possible cracks. If no other concerns are found inspect for a stuck lube regulator valve in the pump cover due to debris.
PIP3366C2018-08-20. Service bulletin. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation.