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
Only bulletins with topic: maintenance are shown. Show all
| 04-06-01-029 | 2005-03-11. 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 |
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| 0406040445 | 2005-03-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LIFE MONITORING SYSTEM - PCM RESET. 2004 ALL GM PASSENGER CARS AND TRUCKS. *TT |
| 040604043 | 2005-02-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UNABLE TO RESET ENGINE OIL LIFE MONITOR. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.