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.
About C0660 on the 2003 Hummer H2: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: C0660 are shown. Show all
| 3324 | 2005-10-27. Service bulletin. SUSPENSION. SERVICE AIR SUSPENSION MESSAGE AFTER REPLACING THE AIR SUSPENSION COMPRESSOR ASSEMBLY FROM A SINGLE STAGE COMPRESSOR TO A DUAL STAGE COMPRESSOR. MAY ALSO HAVE A CURRENT OR HISTORY CODE C0660 AND/OR C0712. *TT |
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| 01004A | 2004-06-30. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) C0660 STORED IN VEHICLE HISTORY. SERVICE VME. *TT 2005 HUMMER H2 ADDED. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.