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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.

By type

By component

By trouble code

By topic

Bulletins, newest first
31792004-11-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. AUTOMATIC DUAL ZONE HVAC BATTERY DRAW SUPPLEMENT TO 02-01-39-007A. *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
31442004-11-05. Service bulletin. STRUCTURE:BODY:HOOD. SUPPLEMENT TO 00-02-35-003F CLUNKING NOISE UNDER HOOD AND CAN BE FELT IN STEERING WHEEL. *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
3045A2004-11-05. Service bulletin. POWER TRAIN. 4485 4484 SHUDDER OR BIND ON TURNS IN 4 HI. *SC
31192004-11-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. ENGINEERING INVESTIGATION - CATALYTIC CONVERTER REPLACEMENT. *SC
31362004-11-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE 4L60E/4L65E AUTOMATIC TRANSMISSION SLIP CONDITION IN 2ND, 3RD, OR 4TH GEAR. ALSO TO INCLUDE THE PONTIAC GTO 2005. *TC
30242004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. GEN III ENGINE COATED PISTON INFORMATION. *TC
31612004-11-04. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. EXCESSIVE BRAKE OR SPONGY BRAKE PEDAL. 03-05 CHEVROLET FULL SIZE TRUCKS AND UTILITIES. 03-05 GMC FULL SIZE TRUCKS AND UTILITIES. 03-05 CADILLAC/HUMMER H2 ALL FULL SIZE TRUCKS AND UTILITIES. *TC
31212004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. EXHAUST VIBRATION RESONANCE OR MOAN. (2004-2005 GMC DENALI) *SC
31232004-11-04. Service bulletin. UNKNOWN OR OTHER. PARTS USAGE FOR BULLETIN 04-01-39-009. (CHEVROLET SSR 2005, CHEVROLET TRAILBLAZER 2005, CHEVROLET SUBURBAN, BUICK RAINIER 2003-2005) *SC
31372004-11-03. Service bulletin. SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM. REAR AIR SUSPENSION COMPRESSOR SERVICE PART CHANGE. *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
31482004-11-03. Service bulletin. VISIBILITY:WINDSHIELD. WINDSHIELD MOLDING REPLACEMENT. *TC
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
30542004-10-14. Service bulletin. POWER TRAIN. REPLACEMENT FLEXPLATE MAY HAVE LARGER BOLT HOLES THAN THE ORIGINAL FLEXPLATE. *TT
30522004-10-14. Service bulletin. STRUCTURE:BODY. PROPANE OR NATURAL GAS TYPE ODOR FROM VEHICLE. *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
30392004-10-14. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. AUTO VOLUME INOPERATIVE AFTER IGNITION KEY IS CYCLED. VARIOUS MODELS INCLUDING 03-04 CADILLAC ALL FULL SIZE UTILITIES. *TT
3050A2004-10-13. Service bulletin. EQUIPMENT. 02-05 ONSTAR EQUIPPED VEHICLES EMITTING BEEPING NOISE BEFORE CONNECTING TO ONSTAR. *TT
30602004-10-13. Service bulletin. EQUIPMENT. KEY CODE LOOK-UP. 1990-2005 ALL MAKES/MODELS INCLUDING HUMMER H2. *TT
30892004-10-04. 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

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