Isx15 randomly shutting down

[redtop23]

A shop in Atlanta about 6 years ago. I'v taken a few trucks to them after this one as well. Paid top dollar for what I was told a good program, never had issues for all these years and engine/abs codes did show up and we quickly addressed them.
I'll have to talk to the shop if they let me get a copy, doubt they will..

The High pressure pump was rebuilt with new superseded parts at around 600k.