I have a 20025 Pontiac Aztek, the battery went dead charged back up now it won't start

That is normal. Charge or replace the battery.

Your vehicle thinks it has been stolen. Go to a GM dealer and he can look up the code to tell the car it has not been stolen.

could be crankshaf sensor,check fuel filter,tune up.

check fuses ( main fuse engine fuse ignition fuse )

Check the battery voltage with a multimeter. If the battery can't deliver a full 12 volts, the starter solenoid won't even activate. It may be that a cell went dead, causing a direct short inside the battery. Replace the battery if your battery is older than 3 years, or take it to an auto parts store to have it tested. The security light on is an issue many people have when the battery is low and the car won't start.

It is also possible that the security chip on the ignition key is worn. If it isn't making contact properly, the computer won't 'read' the resistor, and won't start. You will need to replace the key to see if this fixes the problem.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Here's a video showing you how to remove battery. Battery Replacement 2001 2005 Pontiac Aztek 2003 Pontiac Aztek 3 4L V6

I was just at the shop because my Aztek sunroof wouldn't work. The tech held down the open button for 30 seconds & let go, then it started working again perfectly ! He said it had to be reset. He said it happens when your battery goes dead, & I told him I replaced the battery & that's when it stopped working, There was no charge !

be sure battery is charged check gauge on dash if it drops below 12 volts when you attempt to crank the car charge new battery also another quick test is turn on headlights if they go off when you hit the key battery is dead

Your problem is either the Alternator isent charging its 13.5 volts and the battery is flat or wont hold the charge SO do this.
Jump start engine again let it run for 2 minutes then turn on lights,, the head lights should go bright at 13.5 volts. it engine cuts out..and the lights dont go bright,, then the Alternator is not charging,,,, If they go bright and still cuts out the batterys NO GOOD.
Replace battery or get it checked outit must hold 12volts all the time Let me know how you get on.

First check if battery if it is charge and try again ,or use one that have full charge.
If works you alternater is not charging,
Can also check alternater by pulling ground cable off wile car is running and if stops running change you alternater.