What I would recommend is that you fill the tank to at least 3/4 or full and then see if under hard acceleration it continues to stall.
Possibly with less fuel, it'* sloshing around a bit, and accuracy may be off?
Fuel pressure tests /regulator/ psi at rail / fuel filter been changed?
What year is your Denali? Can you add that to your signature line, be great if you could.
Pro shop Scanners like Solaris & ultra can better diagnose & find codes.
With service stability there are codes stored, and the proper scanner will show them.