So i drove home from work and everything was working fine then i stopped at a store about a block away from my house. When i started my car again and started driving it felt like the one time i ran out of gas (6 years ago). I made it home but since then my car fires up every time without a problem but then it immediately starts dropping rpm. It will try to regain rpm but then eventually stalls out. It usually takes about 10 seconds. I checked the fuel pressure which was fine. There are no trouble codes either. Where else should i be looking?
1999 GMC Sierra 1500