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Service bulletins for the 2008 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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
SB-15-06-03-001B2016-08-09. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION THAT MAY BE USEFUL ON DIAGNOSING BATTERIES THAT HAVE SET FOR A LONG PERIOD OF TIME AND/OR SET IN COLD WEATHER CLIMATES AND TESTING THOSE BATTERIES.
SB-03-06-03-004Q2016-08-09. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. THIS WARRANTY ADMINISTRATION BULLETIN PROVIDE POLICY INFORMATION ON USING THE EL-50313 MIDTRONICS GR8 BATTERY TESTER/CHARGER FOR DIAGNOSING BATTERY REPLACEMENTS AND MAINTAINING BATTERIES ON NEW VEHICLES IN DEALER INVENTORY.
SB-06-08-47-001L2016-08-09. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. THIS INFORMATIONAL BULLETIN PROVIDES WARRANTY INFORMATION ON USING THE SERVICE PROGRAMMING SYSTEM (SPS) FOR PROGRAMMING CONTROL MODULES
PB-10037A2011-06-27. Service bulletin. ELECTRICAL SYSTEM. GM: ONSTAR IS MAKING INCOMPLETE CALLS WITHOUT THE DRIVER KNOWING. WHEN HAVE A DATA CONNECTION. *RM
PIT-4730A2011-03-28. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. BUICK/CADILLAC/CHEVROLET/GMC/HUMMER/PONTIAC/SATURN: ADDITIONAL DIAGNOSTIC INFORMATION FOR U0140 OR U0073. VEHICLE MAY EXHIBITS SOME SYMPTOM(S) AS DOOR LOCKS CYCLE WHILE DRIVING; INTERMITTENT NO START; SERVICE STABILITRAK DIC MESSAGE; SPEEDOMETER AND TACHOMETER FREEZE WHILE DRIVING. *PE
SB-09-06-03-004A2010-03-06. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING. GM/HUMMER/SAAB: INTERMITTENT ILLUMINATION OF MIL, SERVICE LAMPS, SERVICE MESSAGES, OR DTC SET BY VARIOUS CONTROL MODULES-DIAGNOSING AND REPAIRING FRETTING CORROSION (DISCONNECT AFFECTED CONNECTOR AND APPLY DIELECTRIC LUBRICANT). *PE UPDATED 3/26/10. *PE UPDATED 6/6/11. *PE UPDATED 3/12/12. *PE
SB-07-06-04-019A2009-06-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE. GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). *PE UPDATED 11/5/10. *PE UPDATED 4/4/11. *PE UPDATED 2/3/16. *PE
08-08-49-010A2008-09-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; LATCHES/LOCKS/LINKAGES:DOORS:LATCH; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. GMC: LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, IPC WARNING LIGHTS ON, DIC MESSAGES, NO CRANK, IPC GAUGE DROP OR FLUCTUATION, DOOR LOCK CYCLING , HARD TRANSMISSION SHIFT, DTCS U0073, U0100, U0101, U0102, U0109, U0121, U0132, U0140, U2100 SET (INSPECT IDENTIFIED ELECTRICAL CONNECTIONS AND WIRING FOR FAULTS). *PE
0708450022007-11-03. 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
39932006-07-19. Service bulletin. ELECTRICAL SYSTEM. NO CRANK/NO START AT TIMES. *TT UPDATED 1/30/08. *NJ

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