wont start

Sorry but I feel the need to cover a few bases before advising. You said "computer is saying the Security is saying my truck is stolen??" If this info is coming from the dash, I do not trust it. If you connected to the computer, and the code states it, then I do trust it. If the computer has been tripped to a stolen default, the engine will still turn over but will not start! So with this info in mind, I suggest the following; You need to start with a fully charged battery and make sure you have a watch with you. You get in behind the wheel, close the door and from this point on do not operate anything electrical. You Put the key in the ignition and turn it to the run position. do NOT crank the motor! After 1 minute turn the key off. Do nothing for a minute then turn the key to the start position. Again do not crank the engine! Anyway after ten "key on for 1 minute but no cranking cycles" Go ahead and crank it and see if she starts. If it does not start you may need to bump up your one minute to 5 minutes and repeat the ignition procedure. In short key to on for 1 minute, then key off for 1 minute. After ten on/off times crank it and please leave the gas pedal out of it, flooding it will not start it! If you feel or hear the motor kick or hit then lightly try A pump of the gas pedal, to start. You may need to bump up your time to 10 minutes! Please be patent! Good luck.