03 Yukon xl 1500 (vin z) stutters around 4k rpm and randomly shuts off

[Jsmarr123]

The guy I bought it from didn’t know either, had it 6 months he said, believe it to be an old company vehicle but not sure, it definitely doesn’t run like it’s pushing 300k

 

[Doubeleive]

I don't think there is any wiring correlation from the radio to the flex fuel sensor, but when you cut wires on the lan bus with the battery connected it's never a good idea.
I would take the time and get a meter and check each and every fuse.

 

[Jsmarr123]

Thanks for the advice that was on the list tomorrow after work, once it shuts off it’s kind of hard to get started back

 

[Jsmarr123]

I don't think there is any wiring correlation from the radio to the flex fuel sensor, but when you cut wires on the lan bus with the battery connected it's never a good idea.
I would take the time and get a meter and check each and every fuse.

Update, it shut off again today I smacked the fuel tank hard and since has run fine since. Ordered new fuel pump

 

[Fless]

If you haven't been able to look at the fuel pump you may want to have a new lock ring on hand to have when you replace the pump.

 

[Jsmarr123]

If you haven't been able to look at the fuel pump you may want to have a new lock ring on hand to have when you replace the pump.

Ok thank you, I’ll check into that, going to cut a hole in the floor I’m out of town working and don’t think the hotel would appreciate me dropping a tank in the parking lot also it would be quite challenging by myself