Truck won't start. Cranks, but will not turn over.

What is your question?

Having problem with my truck, started puttered out and now will not start. After turn the key on, the battery light flashes in the message center but then the security light comes on. It doesn't flash all the time and it doesn't stay on after my truck is off... is this a passlock issue? I tried the relearn 30 minute process, but the security message doesn't come off after 10 min. Again it only flashes on when my key is on the on position when I take the key out there's no message in the message center.

How long has your 2000 GMC Sierra 1500 had this problem?

A week