wHAT TO DO WHEN MY ANTI-THEFT IS ON AND MY 2004 PONIAC GRAND PRIX WONT START?

ok to reset you anti theft you need a battery charger connect to the battery and onpen the igntion switch for 30 minute then close it for 30 second repeat this step tree time and it will rest now if you have pass code problem it will not reset you will need a reprogrammer that we have let me know good luck