won't start

Hey guys, I have a 2008 base model H3 3.7l. Ive replaced the passlock sensor (programmed with the 3* 10 minute cycles). I left for a fishing trip one week ago, when i came back i got into the vehicle and started it right up. However, the next day it would simply crank (normal speed i guess)...

The Hummer will not start. I tried installing the Diablo tuner. The backup for the tuner worked, then I tried to install the Diablo package and an error came up saying "illegal tune" or something along those lines. I tried reloading the factory tune off the Diablo and it keeps stoping and...