Driving great last night until it cut out making a turn

My tahoe cranks but will not start. Looks like I dont have and injector pulse and I need to know what is preventing that. I have a strong spark, the fuel pump runs and is producing sufficiant pressure. It will run for a second with a couple squirts of carb cleaner. Looking for a little guidance so i'm not chacing my tail. Will the crank sensor only produce crank signal instead of crank and fuel signal, am I looking at a computer or spider injector issue or something different all together. Any help is much appreciated.