P1125 on the 1999 GMC B7
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 990604039 | 1999-11-26. Service bulletin. SUBJECT ON REDUCED ENGINE POWER, DTC (S) P1125, P1275, P1276, P1280, P1281, P1285, AND OR P 1286 MAY BE PRESENT (CURRENT OR IN HISTORY). *MJS |
|---|
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.