Do you hear a click or do you hear the starter drive engage the flexplate?
If you don't, is there power to the "*" terminal(purple wire) of the starter solenoid, when the key is in the crank position(use a test light)?
If no, put your hand on the crank relay and have someone turn the key to the crank position....do you feel it click?
If no, check all fuses?
Have you tried to start the vehicle in neutral?
Have you tried to manually rotate the engine by putting a wrench on the crank bolt?