# P0300 on the 2019 GMC Yukon XL

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.

## Bulletins for this model year that name P0300

- [10161047](https://open.wenmarpro.com/bulletins/10161047), 2019-06-10: This Preliminary Information communication provides information to the technician for a Service Engine Soon light with a Diagnostic Trouble code P0300 set. There may be a rough running engine associated with this concern. If service information diagnostics have been completed and there is still no trouble found, the technician is to inspect for a possible terminal tension concern on the ignition coil power feed for the cause of the rough running engine and or the P0300. For the Service Engine Soon light or traction control lamp concern check the X2 connector of the under hood fuse block for poor pin retention.
- [10149051](https://open.wenmarpro.com/bulletins/10149051), 2018-11-26: This Preliminary Information communication provides information to the technician about vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on and Diagnostic Trouble Code P0300 \- P0308 may set. Technician will inspect for lose sparkplug wire. If a spark plug wire is found lose check for a missing ?C? clip on the wire end for the ignition coil. If the clip is missing replace the wire.