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Service bulletins for the 2004 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.

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

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

Bulletins, newest first
31362004-11-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE 4L60E/4L65E AUTOMATIC TRANSMISSION SLIP CONDITION IN 2ND, 3RD, OR 4TH GEAR. ALSO TO INCLUDE THE PONTIAC GTO 2005. *TC
30542004-10-14. Service bulletin. POWER TRAIN. REPLACEMENT FLEXPLATE MAY HAVE LARGER BOLT HOLES THAN THE ORIGINAL FLEXPLATE. *TT
30602004-09-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 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
0407300132004-08-16. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. AUTOMATIC TRANSMISSION SHIFT, ENGINE DRIVEABILITY CONCERNS OR SERVICE ENGINE SOON (SRS) LIGHT ON AS A RESULT OF THE INSTALLATION OF AN AFTERMARKET REUSABLE, EXCESSIVELY OILED AIR FILTER. 2004 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *MJ 2005 AND PRIOR. *TT
0404950012004-08-12. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. REVISED WHEEL DRIVE SHAFT NUT TORQUE SPECIFICATION. *TT
015992004-06-04. Service bulletin. POWER TRAIN. 4L60E, 4L65E FORWARD AND LOW REVERSE WAVED STEEL CLUTCH PLATE APPEARANCE CHANGE. *TT
016542004-06-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SQUAWK OR GRUNT NOISE THAT OCCURS ON THE 2-3 UPSHIFT ON VEHICLES WITH 4L60E - M30, 4L60E M32 TRANSMISSION. *TT
017142004-05-03. Service bulletin. POWER TRAIN. THE 4L60E/4L65E AUTOMATIC TRANSMISSION MAY EXPERIENCE A LEAK, INOPERATIVE/SLIPPING IN 2ND, 3RD AND 4TH GEARS OR NO MOVEMENT (NO FORWARD OR REVERSE) DUE TO EXCESS FLUID LOSS. SIT BULLETIN 1455088. *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
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
0307300272003-09-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. MOST FREQUENTLY ASKED QUESTIONS AND ANSWERS FOR J 45096 TRANSFLOW TRANSMISSION OIL COOLING SYSTEM FLUSHING MACHINE. 2004 AND PRIOR PASSENGER CARS AND LIGHT DUTY TRUCKS WITH AUTOMATIC TRANSMISSION/TRANSAXLE AND 2004 AND PRIOR HUMMER H2. *TT
990730022A2003-09-30. Service bulletin. POWER TRAIN. SHIFT STABILIZATION AND TOW/HAUL MODE FEATURE FOR HYDRA-MATIC 4L60-E/4L65-E AND 4L80-E/4L85-E TRANSMISSIONS. *TT
030730002A2003-09-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. TRANSMISSION COOLING SYSTEM SERVICE TOOL J 45096 - TRANSFLOW INFORMATION. *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
010730042A2003-03-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. INFORMATION ON 2-3 UPSHIFT OR 3-2 DONWSHIFT CLUNK NOISE FOR 2003 AND PRIOR LIGHT DUTY TRUCKS. *TT THIS BULLETIN REPLACES 01-07-30-042A DATED 10/01/2002. 2004 AND PRIOR LIGHT DUTY TRUCKS. *TT
020730024A2002-10-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT

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