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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
020604057D2004-03-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LABOR OPERATION ASSIGNMENTS FOR CONTROL MODULE PROGRAMMING. VARIOUS MODELS INCLUDING 2004 AND PRIOR PASSENGER CARS AND TRUCKS, 2003-2004 KODIAK C4500-C8500 AND TOPKICK C4500-C8500 SERIES MODELS. *TT
0306040602004-01-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INFORMATION ON NEW SPARK PLUGS AND GAPPING. VARIOUS MODELS INCLUDING PONTIAC GTO 2004. *TT
0306010232003-12-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. HIGHER THAN EXPECTED OIL CONSUMPTION <8500 GVW. VARIOUS MODELS INCLUDING 2003-2004 CHEVROLET KODIAK (C4500-C5500 SERIES MODELS)AND GMC TOPKICK (C4500-C5500 SERIES MODELS). *TT
020604057C2003-12-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LABOR OPERATION ASSIGNMENTS FOR CONTROL MODULE PROGRAMMING. VARIOUS MODELS INCLUDING 2004 AND PRIOR PASSENGER CARS AND TRUCKS, 2003-2004 KODIAK C4500-C8500 AND TOPKICK C4500-C8500 SERIES MODELS. *TT
013392003-11-19. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. HVAC BLOWER MOTOR FAN STAYS ON IN THE HIGH BLOWER POSITION. SERVICE VME. *TT
0306040332003-09-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED DIAGNOSTIC TROUBLE CODE P0336. *TT UPDATE. TO INCLUDE 2004 ISUZU NQR COMMERCIAL MODELS. *TT
0306040302003-08-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MULTIPLE DRIVEABILITY SYMPTOMS OF LONG OR HARD STARTS, CHUGGLE, ROUGH IDLE AND LIGHT OR INTERMITTENT MISFIRE DUE TO CLOGGED FUEL INJECTORS. *TT
0206040152002-05-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INTERMITTENT NO CRANK, NO START CONDITION FOR 2001-2002 PASSENGER CARS AND TRUCKS. *SLC 2001-2007 GM PASSENGER CARS AND LIGHT-DUTY TRUCKS (INCLUDING SATURN). *TT

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