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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.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
0506040352006-05-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; FUEL SYSTEM, GASOLINE. USAGE OF E85 FUELS IN GM VEHICLES. 1997 - 2008 ALL GM CARS AND TRUCKS. 1997 - 2008 ALL SATURN VEHICLES. *TT UPDATED. *KB UPDATED ON 10/22/07. *NJ
0006040332005-12-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. I/M READINESS AS PART OF EMISSION INSPECTION AND MAINTENANCE PROGRAM FOR OBD II VEHICLES. *TT
0506010142005-11-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK UNDER EXTREME COLD TEMPERATURES (-34 DEGREES C) (-30 DEGREES F) OR COLDER). *TT
0506040222005-05-14. 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
0506040212005-05-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT
32322005-05-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 1999 - 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR P0174. *TT
30452005-04-20. Service bulletin. ENGINE AND ENGINE COOLING. SHUDDER OR BIND ON TRUNS IN 4 HI. *EH UPDATED 03-01-07. *KB
04-06-01-0292005-03-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UNNECESSARY ENGINE CRANKCASE AND SUBSYSTEMS FLUSHING SERVICES, ADDITIVE RECOMMENDATIONS AND PROPER UTILIZATION OF GM SIMPLIFIED MAINTENANCE SCHEDULE TO ENHANCE CUSTOMER SERVICE EXPERIENCE. 2008 AND PRIOR GM CARS AND TRUCKS. *TT UPDATED 3/31/08. *NJ
0006010122005-03-11. Service bulletin. ENGINE AND ENGINE COOLING. USE OF SURFACE CONDITIONING DISKS. *EH
0406030022005-03-11. Service bulletin. ENGINE AND ENGINE COOLING. DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH
0406030012005-03-10. Service bulletin. ENGINE AND ENGINE COOLING. INCORRECT AMP CODE GENERATOR. *EH
0406010132005-03-08. Service bulletin. ENGINE AND ENGINE COOLING. INFORMATION ON SERPENTINE BELT WEAR. *EH
0301390102005-03-07. Service bulletin. ENGINE AND ENGINE COOLING. INSUFFICIENT HVAV SYSTEM COOLING HISSING NOISE ON ENGINE SHUT OFF. *EH
0406040402005-02-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. IDLE INSTABILITY, LOW OR ROUGH IDLE WITH ELECTRONIC THROTTLE CONTROL. *TT
0406040512004-12-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MAINTENANCE CLEANING OF FUEL INJECTORS. 2005 AND PRIOR ALL GENERAL MOTORS PASSENGER CARS AND TRUCKS INCLUDED. *TT
040604047C2004-12-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. TOP TIER DETERGENT GASOLINE. 2005 AND PRIOR ALL GENERAL MOTORS PASSENGER CARS AND TRUCKS ALSO INCLUDED. *TT UPDATE. *TT
30872004-12-17. Service bulletin. ENGINE AND ENGINE COOLING. CRANK NO START, STALL, HARD START, AND NO CRANKING RPM. *EH
30562004-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHECK ENGINE LIGHT WITH A P0300 DUE TO 2-4 CYLINDERS MISFIRING ON THE SAME BANK OF THE ENGINE. *TT
31212004-11-08. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. EXHAUST VIBRATION RESONANCE OR MOAN IN VEHICLES WITH GEN III V8 ENGINES. *TC
30972004-11-05. Service bulletin. ENGINE AND ENGINE COOLING. OIL PAN OR OIL COOLER LINE LEAK. *SC
31072004-11-05. Service bulletin. ENGINE AND ENGINE COOLING. P0420 AND P0430 DTSC IN THE DETROIT, MICHIGAN AREA WITH GEN III V-8 ENGINES. *SC
31192004-11-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. ENGINEERING INVESTIGATION - CATALYTIC CONVERTER REPLACEMENT. *SC
30242004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. GEN III ENGINE COATED PISTON INFORMATION. *TC
31212004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. EXHAUST VIBRATION RESONANCE OR MOAN. (2004-2005 GMC DENALI) *SC
31472004-11-03. Service bulletin. ENGINE AND ENGINE COOLING. CONCERNS REGARDING BULLETIN 00-02-35-003F. ALL FULL SIZE TRUCKS AND UTILITIES AND HUMMER PARTS AVAILABLE. *TC

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