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Service bulletin 030421002

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 id10001244
Published by NHTSA2003-04-24
Manufacturer's number030421002
Manufacturer's date2003-03-01
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

TRANSFER CASE BUSHING / SLIP YOKE LEAK, TRANSMISSION DOWNSHIFTING, LOSS OF POWER, VEHICLE WILL NOT MOVE. *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, Automatic transmission

Vehicles listed
HUMMER H22003

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

Recalls for the same vehicles and component
03V0750002003-03-06. 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
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
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.
02-07-30-052J2017-08-15. Service bulletin. This informational bulletin provides technicians with information regarding automatic transmission oil cooler flow test essential tool J-45096 TransFlow®.
0307300072007-03-05. Service bulletin. DELAYED ENGAGEMENT WHEN SHIFTING INTO THESE POSITIONS. PARK INTO REVERSE, NUETRAL INTO DRIVE, NUETRAL INTO REVERSE, AND PARK INTO DRIVE. THIS BULLETIN INCLUDES ALL 2000 - 2007 GM LIGHT DUTY TRUCKS. *KB
31362007-02-22. Service bulletin. SLIP CONDITION IN 2ND, 3RD, OR 4TH. DAMAGED 2-4 OR 3-4 CLUTCH. *KB UPDATED 10/31/07. *NJ
0407300062005-03-10. Service bulletin. 4L65 4L60E 4L60 AND 2004R AUTOMATIC TRANSMISSION OIL PUMP SPRING FIRST AND SECOND DESIGN IDENTIFICATION. *EH
0407300372004-12-28. Service bulletin. RELEASE OF DEXRON III (H-REVISION) AUTOMATIC TRANSMISSION FLUID (ATF). 2005 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT
31362004-11-04. Service bulletin. THE 4L60E/4L65E AUTOMATIC TRANSMISSION SLIP CONDITION IN 2ND, 3RD, OR 4TH GEAR. ALSO TO INCLUDE THE PONTIAC GTO 2005. *TC
30602004-09-27. Service bulletin. THE ENGINE DOES NOT STALL WHEN PERFORMING A P1870 DIAGNOSTIC TEST WITH THE TECH 2 SCAN TOOL OR WHEN COMMANDING THE TORQUE CONVERTER CLUTCH ENABLE SOLENOID ON APPLICATIONS THAT DO NOT HAVE THE P1870 DIAGNOSTIC TEST LISTED. 4L60E OR 4L65E TRANSMISSIONS. *TT