built my 6.0 and put it back in the truck and tried to fire it before bolting on the turbo and my engine builder said the aniti theft code wont allow the engine to start. i dont want to tow it to gm and pay them. any ideas as to what i can do. thanks so much

 

Is the security light on? Sounds like you might need a security relearn.

Grabbed this off FSC... (make sure your lights and accessories and whatnot are off if you do this)

1. First, insert the ignition key and turn the ignition switch to the “On” position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switch off for 30 seconds.
3. Turn the ignition switch to the “On” position (as in step #1) for 11 minutes again.
4. Turn the ignition switch off for another 30 seconds.
5. Turn the ignition switch to the “On” position for 11 minutes a third time.
6. Turn the ignition switch off for 30 seconds one final time.
7. Turn the ignition switch to the “On” position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them before attempting the relearn procedure again.

 

thank you so much im gonna try it

 

Did this end up working?