Found it! After talking to Chevy Dealer Mech. here in town he said to look at the PCM fuses. Turns out to be PCM B 20amp fuse blown. Why I dont know, but it has ran fine all day except it is relearning the idle and such. Thanks guys.

 

normaly that indicates a fuel pump wiring issuein the tank.

Seen that as well. Just keep some fuses with you, if it keeps happening you will need to pull tank and look at pump wires

 

I just had this intermittantly. Looks like it was a loose battery connection, even though they felt pretty tight.