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Service bulletins for the 2003 Hummer H2

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.

750 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
0404950012004-08-12. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. REVISED WHEEL DRIVE SHAFT NUT TORQUE SPECIFICATION. *TT
112520022004-08-10. Service bulletin. POWER TRAIN:DRIVELINE. CLUNK NOISE ON A 3-2 DOWNSHIFT. *TT
990730016A2004-07-13. Service bulletin. POWER TRAIN. DIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING FAN. *TT
015992004-06-04. Service bulletin. POWER TRAIN. 4L60E, 4L65E FORWARD AND LOW REVERSE WAVED STEEL CLUTCH PLATE APPEARANCE CHANGE. *TT
030730007A2004-03-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. ENGAGEMENT TIME OF ELECTRONICALLY CONTROLLED TRANSMISSIONS IN GENERAL MOTORS VEHICLES. VARIOUS MODELS INCLUDING 2000-2006 ALL LIGHT DUTY TRUCKS. *TT
0307300562004-03-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L60-E AUTOMATIC TRANSMISSION OIL PUMP FIRST AND SECOND DESIGN IDENTIFICATION. *TT
014832004-03-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). VEHICLE HAS NO PCM (POWER TRAIN CONTROL MODULE) COMMUNICATION WITH TECH 2. SIT BULLETIN 1400427. *TT
015022004-03-01. Service bulletin. POWER TRAIN. 4L65E TRANSMISSION SHIFTS FREQUENTLY. SERVICE VME. SIT BULLETIN 1402886. *TT
007022004-03-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SLIP CONDITION IN 2ND, 3RD OR 4TH DAMAGED 2-4 BAND 3-4 CLUTCH ON THE 4L60E/4L65E AUTOMATIC TRANSMISSION. *TT *MJ
010730038B2004-02-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE SERVICE ENGINE SOON LAMP IS ILLUMINATED, NO 3RD AND 4TH GEAR, THE TRANSMISSION DOES NOT SHIFT CORRECTLY, THE TRANSMISSION FEELS LIKE IT SHIFTS TO NEUTRAL OR A LOSS OF DRIVE OCCURS. *TT
1022032004-01-26. Service bulletin. POWER TRAIN. TRANSMISSION SHIFT BEHAVIOR. GM VOICEMAIL LOG. *TT
014322003-12-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. AUTOMATIC TRANSMISSION POOR ACCELERATION, PERFORMANCE. *TT
990420002B2003-12-05. Service bulletin. POWER TRAIN. DRIVELINE CLUNK. VARIOUS MODELS INCLUDING 2004 AND PRIOR LIGHT DUTY TRUCK MODELS. *TT
0307300432003-12-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. INFORMATION REGARDING AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL FUNCTION. VARIOUS MODELS INCLUDING 2004 AND PRIOR PASSENGER CARS AND TRUCKS. *TT UPDATING TO 2007 AND PRIOR PASSENGER CARS AND TRUCKS. *KB
020730029D2003-12-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. PRODUCT QUALITY CENTER FOR ENGINE AND TRANSMISSION ASSEMBLY AND TRANSFER CASE REPLACEMENT. VARIOUS MODELS INCLUDING 2004 AND PRIOR PASSENGER VEHICLES AND LIGHT DUTY TRUCKS. *TT 2005 AND PRIOR PASSENGER VEHICLES AND LIGHT DUTY TRUCKS. *TT
010418001C2003-12-01. Service bulletin. POWER TRAIN. DRIVELINE CHARACTERISTICS FOR ALL-WHEEL DRIVE (AWD) AND FOUR-WHEEL DRIVE (4WD) SYSTEMS. *TT UPDATED *EH
0522032003-10-28. Service bulletin. POWER TRAIN. PRODUCT FIELD ACTION 03012. VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. IN ADDITION, THESE VEHICLES HAVE AN OVERRIDE THAT CAN ALLOW THE TRANSMISSION TO BE SHIFTED OUT OF PARK WITH THE IGNITION IN THE OFF POSITION. *TT
00522032003-10-28. Service bulletin. POWER TRAIN. DRIVELINE CLUNK WHEN STOPPING. THIS NOISE OCCURS ON A 3/2 DOWNSHIFT AT APPROXIMATELY 15 MILES PER HOUR AND MAY BE MORE NOTICEABLE ON QUICK STOPS. *TT
0307300282003-10-02. Service bulletin. POWER TRAIN. DRIVELINE CLUNK WHEN STOPPING. *TT
030730002A2003-09-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. TRANSMISSION COOLING SYSTEM SERVICE TOOL J 45096 - TRANSFLOW INFORMATION. *TT
0304180032003-09-27. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. REVISED WHEEL DRIVE SHAFT INNER JOINT AND SEAL REPLACEMENT. *TT
1210022003-09-12. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. ENGINEERING HAS REQUESTED REPORTS OF TRANSMISSION SHIFT LINKAGE CABLE IN CASES WHERE AN ACCUMULATION OF MUD, ICE OR DEBRIS HAS BEEN NOTED. *TT
0311032003-07-25. Service bulletin. POWER TRAIN. NEW PROP SHAFT ORDERING INFORMATION. *TT *JB
0304210022003-04-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSFER CASE BUSHING / SLIP YOKE LEAK, TRANSMISSION DOWNSHIFTING, LOSS OF POWER, VEHICLE WILL NOT MOVE. *TT
010730036D2003-03-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. DIAGNOSTIC TIPS FOR DIAGNOSTIC TROUBLE CODE P0756. 2006 AND PRIOR PASSENGER VEHICLES AND LIGHT DUTY TRUCKS. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.