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
Only bulletins with component: Electrical system are shown. Show all
| PIP5094A | 2016-09-26. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT ,WHEN TESTING ANY CIRCUIT FOR OPEN OR RESISTANCE, IT IS IMPERATIVE THAT ALL RELATED TERMINAL PIN FIT AND TENSION BE CHECKED WHEN THE TEST STEPS REQUIRE DISCONNECTION OF THE CONNECTOR OR COMPONENT, PRIOR TO ANY COMPONENT REPLACEMENT. ALWAYS USE THE RECOMMENDED TERMINAL TEST TOOL DURING THESE TESTS. |
|---|---|
| PIC-4935-E | 2016-08-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM. |
| PIC-5050-A | 2016-08-17. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE STEPS ON REPAIRING THE CONCERN. A CUSTOMER MAY IDENTIFY A CONCERN OF UNABLE TO REACTIVATE A VEHICLE'S ONSTAR THAT HAS BEEN PREVIOUSLY DISABLED BY ONSTAR. DEALER IS TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE IF THE CONCERN IS STILL PRESENT. |
| 08089-B | 2009-02-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). GENERAL MOTORS CORP: SPECIAL COVERAGE ADJUSTMENT; ANALOG ONSTAR DEACTIVATION. *PE UPDATED 2/17/09. *PE |
| 070845002 | 2007-11-03. Service bulletin. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. SERVICE ALERT: CONCERNS WITH AFTERMARKET FUSES IN GM VEHICLES 2008 AND PRIOR GM PASSENGER CARS AND LIGHT DUTY TRUCKS (INCLUDING SATURN) *NJ |
| 4486 | 2007-10-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. ONE OF THE FOLLOWING CONCERNS WHEN PROGRAMMING THE MILEAGE OR THE HOURS INTO AN EXCHANGE INSTRUMENT PANEL CLUSTER THAT IS RECEIVED FROM AN ELECTRONIC SERVICE CENTER (ESC). *NJ |
| 060421001 | 2007-01-24. Service bulletin. ELECTRICAL SYSTEM. UPDATED TRANSFER CASE CONNECTOR SERVICE KIT NOW AVAILABLE FOR TRANSFER CASE SPEED SENSOR WIRE HARNESS CONNECTOR THAT COMES LOOSE OR CONNECTOR RETAINER CLIP BREAKS. 2007 AND PRIOR GM LIGHT DUTY TRUCKS. *KB |
| 060845004 | 2007-01-24. Service bulletin. ELECTRICAL SYSTEM:WIRING. INSTRUMENT PANEL, BODY AND GENERAL WIRING HARNESS REPAIR. 2007 AND PRIOR GM PASSENGER CARS AND TRUCKS. *KB |
| 050603002 | 2005-11-09. Service bulletin. ELECTRICAL SYSTEM. BATTERY AND CHARGING SYSTEM ELECTRICAL DIAGNOSTICS. 1997 - 2006 ALL GM CARS AND TRUCKS. *TT |
| 3382 | 2005-04-20. Service bulletin. ELECTRICAL SYSTEM:IGNITION:SWITCH. IGNITION KEY CAN NOT BE ROTATED IN STEERING COLUM LOCK CYLINDER. THIS INCLUDES 1999-05 CHEVROLET AND GMC FULL SIZE TRUCKS AND UTILITY. *EH |
| 02132004 | 2005-04-06. Service bulletin. ELECTRICAL SYSTEM:IGNITION. IGNITION KEY CAN NOT BE REMOVED FROM THE LOCK CYLINDER - SERVICE TIP. *TT |
| 020603010 | 2005-02-12. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. BATTERY PARASITIC DRAIN. THIS SERVICE BULLETIN REPLACES 020603010. *EH |
| 3215 | 2004-12-15. Service bulletin. ELECTRICAL SYSTEM. INSTRUMENT PANEL CLUSTER GUAGES FLOAT UP AFTER IGNITION KEY TURNED OFF. VARIOUS MODELS INCLUDING 99-05 CHEVROLET, GMC AND CADILLAC FULL SIZE UTILITIES. *TT |
| 3089 | 2004-10-04. Service bulletin. ELECTRICAL SYSTEM. SERVICE ENGINE SOON LIGHT AND REDUCED ENGINE POWER WITH A DIAGNOSTIC TROUBLE CODE P1516. DIAGNOSTIC TROUBLE CODES P0120, P0220, P1514, P1515, P1518 AND P2135 MAY ALSO BE PRESENT. *TT |
| 020089017A | 2004-08-11. Service bulletin. ELECTRICAL SYSTEM. ESSENTIAL TOOLS THAT INCLUDE CONSUMABLE PARTS/ELECTRICAL TERMINALS. 2004 AND PRIOR GM PASSENGER VEHICLES AND TRUCKS AND 2004 AND PRIOR ISUZU LIGHT AND MEDIUM DUTY TRUCKS. *TT |
| 01718 | 2004-07-16. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. STARTER CLICKS - NO CRANK CONDITION. *TT |
| 01004A | 2004-06-30. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) C0660 STORED IN VEHICLE HISTORY. SERVICE VME. *TT 2005 HUMMER H2 ADDED. *TT |
| 01592 | 2004-02-27. Service bulletin. ELECTRICAL SYSTEM. 2003-2004 GENERATION 5 ONSTAR STEERING WHEEL CONTROL FUNCTION EXPLANATION. SIT BULLETIN 1416474. *TT |
| 030604012 | 2003-04-05. Service bulletin. ELECTRICAL SYSTEM. INSPECTION OF ALL RELATED WIRING HARNESS CONNECTIONS WHEN DIAGNOSING MISCELLANEOUS DIAGNOSTIC TROUBLE CODES, INTERMITTENT DRIVEABILITY CONCERNS, HARD START, NO START, INCORRECT GAUGES, INOPERATIVE AIR CONDITIONING SYSTEMS, SERVICE ENGINE SOON LAMPS ILLUMINATED, 4WD LAMP ILLUMINATED, INSTRUMENT PANEL GAUGES INOPERATIVE, CRUISE INOPERATIVE. 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT |
| 020603008 | 2002-09-28. Service bulletin. ELECTRICAL SYSTEM. LOW VOLTAGE DISPLAY ON IP GAUGE, LIGHTS DIM AT STOP LIGHTS, BATTERY DISCHARGED, NO START, SLOW CRANKING, DIM LIGHTS AT IDLE, LOW GENERATOR OUTPUT. NLM *AR INCLUDES 1990-2008 PASSENGER CARS AND LIGHT DUTY TRUCKS INCLUDING SATURN. UPDATED 07-24-07. *KB UPDATED 11/29/07. *NJ |
| 020603009 | 2002-09-28. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. BATTERY CHARGING TIPS - 1990-2003 PASSENGER CARS AND LIGHT DUTY TRUCKS, 1990-2003 ISUZU LIGHT DUTY TRUCKS, 2003 HUMMER H2. NLM 1990 - 2007 GM PASSENGER CARS AND LIGHT DUTY TRUCKS (INCLUDING SATURN); 1990 - 2007 ISUZU LIGHT DUTY TRUCKS. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.