B0066 on the 2003 Chevrolet Express
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.
| 02085 | 2004-07-12. Service bulletin. SIR/AIR BAG LIGHT ON DIAGNOSTIC TROUBLE CODE (DTC) B0058, B0059, B0065 AND/OR B0066 AFTER SDM REPLACEMENT. *TT |
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1 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.