the reason the truck won't start is due to the ignition cut out that is built into the alarm. when the battery is disconnected it assumes a break in and this alarm and disrupts the ignition. the reset button will fix both problems but your alarm will not work the same until you get it reprogrammed. when I sat it won't work right it just means that the alarm will not sound and the ignition will not be disrupted. If you were to get a keyfob remote then they may be able to reprogram it at the dealership.