C0660 on the 2004 Hummer H2
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 3324 | 2005-10-27. Service bulletin. 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. DIAGNOSTIC TROUBLE CODE (DTC) C0660 STORED IN VEHICLE HISTORY. SERVICE VME. *TT 2005 HUMMER H2 ADDED. *TT |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.