WenmarOpen by Wenmar Pro

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

Bulletins, newest first
30782004-11-17. Service bulletin. FUEL SYSTEM, OTHER. SOME 2004 FULL SIZE TRUCKS AND UTILITIES MAY EXPERIENCE A DIAGNOSTIC TROUBLE CODE P0442. *TT
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
30442004-11-17. Service bulletin. EQUIPMENT. GENERATION 5 ONSTAR STEERING WHEEL CONTROL FUNCTION. *TT
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
30902004-11-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). UNABLE TO PERFORM SET UP NEW ONSTAR ON VEHICLES WITH GEN 6.05 HARDWARE. *SC
31132004-11-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). GEN 6 VEHICLES IN MOUNT AIRY, NC CANNOT CONNECT TO ONSTAR OR EMERGENCY SERVICES. *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
31062004-11-04. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. XM RADIO WAS WORKING PRIOR TO JULY 26, 2004 AND IT IS INOPERATIVE NOW. *JB
31202004-11-04. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). ONSTAR CENTER UNABLE TO PERFORM REMOTE DIAGNOSTIC. (2004-2005 CHEVROLET YUKON, 2005 CHEVROLET TRAILBLAZER, 2002, 2003, 2005 BUICK RAINIER, 2005 CHEVROLET EXPRESS VAN, AND 2005 CADILLAC SEVILLE) *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
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
31112004-11-03. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). NAVIGATION SYSTEM COVERAGE OF CANADA. (2004-2005 CHEVROLET TRAILBLAZER, 2004-2005 GMC ENVOY, 2004-2005 BUICK RAINIER/RENDEZVOUS, 2004-2005 CADILLAC ESCALADE, 2005 CHEVROLET AVALANCHE/SUBURBAN/TAHOE, 2004-2005 GMC DENALI, 2005 GMC YUKON, AND 2005 HUMMER H2) *SC
31372004-11-03. Service bulletin. SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM. REAR AIR SUSPENSION COMPRESSOR SERVICE PART CHANGE. *SC
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
31462004-11-02. Service bulletin. TIRES. ALL GENERAL MOTORS LIGHT DUTY TRUCKS AND HUMMER H2 BRIDGESTONE DUELER A/T TIRES SIZE LT285/75R16 LOAD RANGE D. *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

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