U1000 on the 2004 GMC Yukon
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.
| 01267F | 2004-07-06. Service bulletin. SERVICE 4WD LIGHT ON NO CODES BESIDES U1000 CODES OR C0550. *MJ |
|---|---|
| 01267B | 2003-11-21. Service bulletin. SERVICE 4WD LIGHT ON NO CODES BESIDES U1000 CODES. SERVICE VME. *TT |
| 01267A | 2003-11-19. Service bulletin. SERVICE 4WD LIGHT ON, THE 4WD IS INOPERATIVE AND NO CODES BESIDES U1000 CODES. SERVICE VME. *TT |
3 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.