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.
By type
By component
By trouble code
By topic
| 050090004 | 2005-11-07. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. REVISED FRONT AND REAR DRIVE AXLE FLUID CAPACITIES AND WHEEL NUT TORQUE SPECIFICATION. *TT |
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| 050601014 | 2005-11-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK UNDER EXTREME COLD TEMPERATURES (-34 DEGREES C) (-30 DEGREES F) OR COLDER). *TT |
| 3367A | 2005-11-07. Service bulletin. SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM. REAR AIR SUSPENSION - TRIM HEIGHT TOOL SET. *TT |
| 050850008 | 2005-11-05. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. INTERMITTENT HEATED SEATS INOPERATIVE, DIAGNOSTIC TROUBLE CODE B3941 SET. *TT |
| 050307009 | 2005-11-04. Service bulletin. SUSPENSION. VEHICLE WHEEL ALIGNMENT REQUIREMENTS AND RECOMMENDATIONS. 2006 AND PRIOR PASSENGER CARS AND LIGHT DUTY TRUCKS. *TT |
| 050730013 | 2005-11-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L60-E/4L65-E AUTOMATIC TRANSMISSION SECOND GEAR START, LACK/LOSS OF POWER WHEN ACCELERATING FROM A STOP. *TT |
| 050308006 | 2005-11-04. Service bulletin. SUSPENSION. REVISED STABILIZER SHAFT LINK REPLACEMENT PROCEDURE AND FASTENER TIGHTENING SPECIFICATIONS. 1999 - 2005 CHEVROLET AND GMC FULL SIZE PICKUP AND UTILITY MODELS. *TT |
| 000846003 | 2005-11-03. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). GLOBAL POSITION SENSOR (GPS) PERFORMANCE DEGRADATION. 1996 - 2005 PASSENGER CARS AND TRUCKS. 2002 - 2005 SATURN VEHICLES. *TT |
| 3424 | 2005-11-02. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). ELECTRONIC TRANSFER CASE UNABLE TO COMPLETE SHIFT. *TT |
| 3461 | 2005-10-29. Service bulletin. SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM. REAR AIR SUSPENSION IN-OP DTC C0563. *TT |
| 3324 | 2005-10-27. Service bulletin. SUSPENSION. SERVICE AIR SUSPENSION MESSAGE AFTER REPLACING THE AIR SUSPENSION COMPRESSOR ASSEMBLY FROM A SINGLE STAGE COMPRESSOR TO A DUAL STAGE COMPRESSOR. MAY ALSO HAVE A CURRENT OR HISTORY CODE C0660 AND/OR C0712. *TT |
| 3310 | 2005-10-26. Service bulletin. STEERING:HYDRAULIC POWER ASSIST SYSTEM. LACK OF STEERING ASSIST WHEN STOPPED OR DURING PARKING LOT TYPE MANEUVERS. 99 - 05 CHEVROLET/GMC/CADILLAC/HUMMER H2 ALL FULL SIZE TRUCKS UTILITIES AND VANS. *TT |
| 3600 | 2005-10-24. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. SERVICE VME - SUNROOF MOTOR REPLACEMENT INFORMATION. *TT |
| 3521 | 2005-09-28. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. ANTI-LOCK BRAKING SYSTEM (ABS) LIGHT ON SPEEDOMETER MAY BE ERRATIC. DIAGNOSTIC TROUBLE CODE (DTC) C0055 C0235 C0236 OR C0237 STORED IN THE EBCM. *TT 1998-2008 ALL CHEVROLET, GMC, BUICK, AND OLDSMOBILE MID-SIZED TRUCKS AND UTILITIES. 1998-2008 ALL CHEVROLET, GMC, AND CADILLAC FULL SIZED TRUCKS AND UTILITIES. *KB UPDATED ON 09/20/07. *NJ |
| 702 | 2005-09-10. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. NAVIGATION RADIO HUM. THIS APPLIES TO 2003-05 CHEVROLET/GMC/CADILLAC/HUMMER H2 FULL SIZE UTILITIES. GM TECH LINKS. *TT |
| 702 | 2005-09-09. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). NAVIGATION RADIO SYSTEM DOES NOT HAVE COMPLETE COVERAGE. GM TECH LINKS. *TT |
| 609 | 2005-09-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C LOW PRESSURE SWITCH DIAGNOSIS. *SC |
| 609 | 2005-09-02. Service bulletin. SUSPENSION:FRONT:HUB. FRONT HUB BEARING GREASE LEAK. *SC |
| 610 | 2005-08-11. Service bulletin. VISIBILITY:WINDSHIELD. WINDSHIELD UPPER REVEAL MOLDING WHICH MAY CONTRIBUTE TO WIND NOISE IN THE WINDSHIELD AREA. GM TECH LINK. *TT |
| 050846006A | 2005-05-14. Service bulletin. EQUIPMENT. INFORMATION ON UPGRADING CERTAIN ONSTAR GENERATION 5 ANALOG/DIGITAL-READY SYSTEMS TO ONSTAR GENERATION 6 DUAL-MODE (ANALOG/DIGITAL). *TT |
| 050846005 | 2005-05-14. Service bulletin. EQUIPMENT. ONSTAR LABOR OPERATION CODES. 1996-2005 GM PASSENGER CARS AND TRUCKS AND SATURN VEHICLES. *TT |
| 050846004 | 2005-05-14. Service bulletin. EQUIPMENT. ONSTAR PHONE NUMBER CONCERNS (PHONE NUMBER INCORRECT/ASSIGNED TO ANOTHER VEHICLE/PHONE) THAT OCCUR DURING DIAGNOSIS OF ONSTAR SYSTEM. 2000-2005 GM PASSENGER CARS AND TRUCKS AND 2003-2005 SATURN VEHICLES WITH ONSTAR. *TT |
| 050604022 | 2005-05-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. TOP TIER DETERGENT GASOLINE (DEPOSITS, FUEL ECONOMY, NO START, POWER, PERFORMANCE, STALL CONCERNS). 2005 AND PRIOR ALL GENERAL, SAAB AND SATURN CARS AND TRUCKS. *TT |
| 050604021 | 2005-05-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT |
| 050089018 | 2005-05-13. Service bulletin. UNKNOWN OR OTHER. GM PARTS ORDERING SYSTEM. ALL 2005 AND PRIOR GM AND TRUCKS. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.