H2 on E then will not crank or start..HELP!!

[trofeo16]

I was driving the truck and knew I was running on E. The truck began to sputter and then stalled. Figured I ran out of fuel. Put 2 gallons of gas into the truck and tried restarting. It would not crank. The battery is fully charged and all gauges come on. Checked all ignition, crank and starter fuses. The passlock 2 light seems to come on after a few minutes and stay lit. The onstar light is lit up red. The recirc light on the climate control comes on even when unit is turned off. Please help and suggestions.