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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: Engine are shown. Show all

Bulletins, newest first
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
31212004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. EXHAUST VIBRATION RESONANCE OR MOAN. (2004-2005 GMC DENALI) *SC
3121A2004-11-03. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. EXHAUST VIBRATION RESONANCE OR MOAN 99-05 FULL SIZE TRUCKS AND UTILITY VEHICLES WITH GEN 3 V-8 ENGINES. *TC
30582004-10-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GOODWRENCH ENGINE AND REPLACEMENT CRANKSHAFT INFORMATION. *TT
30552004-10-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT WITH A P0300 MISFIRE DUE TO MISFIRES MAINLY ON CYLINDER 7. *TT
30382004-10-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE TICK, RATTLE OR KNOCK NOISE AFTER CYLINDER HEAD GASKET REPLACEMENT ON THE 6.0L ENGINE. *TT
3022A2004-10-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 04 FULL SIZE TRUCKS AND UTILITIES WITH VIN G, N, T, V AND U ENGINES MAY HAVE A HIGH ALTITUDE, HIGH AMBIENT TEMPERATURE STALL. *TT
30872004-10-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CRANK NO START WITH NO CRANKING RPM SPARK OR INJECTOR PULSE. *TT
30862004-10-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. WHISTLE NOISE FROM THE THROTTLE BODY AREA ON LIGHT THROTTLE ACCELERATION ON VEHICLES WITH GEN III ENGINES AND ELECTRONIC THROTTLE. *TT
30252004-08-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 04 MODEL YEAR 4.8.5.3.7.6.0 GEN III ENGINE PISTON PIN INFORMATION. *MJ
30182004-08-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE CYLINDER HEAD CUP PLUG COOLANT LEAK. *MJ
15300762004-08-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VEHICLES AND HUMMER H2 WITH A HIGH ALTITUDE STALL. *MJ
30152004-08-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 6.0L LQ4 VIN U ENGINE RESTRICTION. *TT
0406040362004-08-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. WARRANTY COVERAGE CHANGE FOR EMISSION-RELATED REPROGRAMMING EVENTS. 2005 AND PRIOR GM PASSENGER VEHICLES AND TRUCKS. *MJ
013532004-07-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE MISFIRE DUE TO INJECTOR FRETTING CORROSION. *TT
00872A2004-07-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL PAN OR OIL COOLER LINE LEAK ON GEN III V-8 ENGINES EQUIPPED WITH AN OIL COOLER. *TT
020682004-07-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. NO START WITH DIAGNOSTIC TROUBLE CODE (DTC) P1626 OR P1631. ALSO INCLUDES 1998-2004 CHEVROLET, GMC FULL SIZE TRUCKS/ UTILITIES/ VANS. *TT
020542004-07-09. Service bulletin. ENGINE AND ENGINE COOLING. ELIMINATION OF LOW COOLANT MESSAGE FROM DIC. SERVICE VME. *TT
010120042004-06-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GENERAL INFORMATION ON RESETTING THE GM OIL LIFE SYSTEM. 03-05 CHEVROLET ALL FULL SIZE TRUCKS AND UTILITIES AND 03-05 GMC ALL FULL SIZE TRUCKS AND UTILITIES AND 03-05 CADILLAC FULL SIZE UTILITIES AND 2005 HUMMER H2. *TT
019392004-05-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.3 4.8 5.3 6.0 LR4 LU3 LM7 L59 LQ4 LQ9 ENGINES- EVAP CODE P0442. *MR
018812004-05-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE CONTINUES TO RUN WHEN YOU TAKE THE KEY OUT OF THE IGNITION. *TT
030605008B2004-03-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. ADVANCE SERVICE INFORMATION - EXHAUST SYSTEM POPPING/SNAPPING NOISE WHEN VEHICLE IS HOT, AT IDLE OR IMMEDIATELY AFTER VEHICLE IS SHUT OFF. *TT BULLETIN 03-06-05-008, DATED 11/01/2003 REPLACED. *TT

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