I am confused by you.......does the vehicle crank over and not start, or it doesn't crank at all?
If it cranks, and doesn't start, have you checked fuel pressure and spark? Will it start if you spray carb cleaner into the intake?
If it doesn't crank, do you feel the starter relay click, when the key is in the crank position? Have you jumped the starter relay to see if the starter cranks over?
Have you scanned it for codes?