Key locked in 2001 pontiac grand prix battery is

You turn the key on - off - on - off - on within 3 seconds and then hold both the lock and unlock buttons on the remote for 3 -5 seconds. The doors should lock and unlock, you can let go of the buttons now....it should be programed.

more info required, year, model, which lights,....???

You need a car battery and a set of jumper cables. Connect one positive side to the battery cable on the starter and ground on the body of the vehicle. And the other ends on the battery. Then use the remote.

It all depends on what type of alarm you have installed on your Gran Prix. Make of alarm and fcc id number of the key fob would be helpful in determining how to put your alarm in valet mode, and still allow remote door unlocking, with alarm off.

Hold down the the lock and unlock buttons on the remote while by the vehicle for about 10 seconds this should reset the key fob.The locks may cycle but should correct the issue.

Dont know if this will help but it may work.. You may have to resyncronize the remotes , this is done by holding the lock and unlock buttons down together at the same time for 10 or 15 seconds and the door locks will cycle up and down once ,then do the same with the other remote then syncronization is complete... sometimes the cars remote function actuator forgets which signal to watch for or it gets confused...lol hope this helps

i had the same thing happen to me i just replaced the battery the had it reprogarmed. by a pontiac dealership mechanic

Have you found out what was going on? My car just started doing it as well.

Have you checked the wires between the doors and body, they will break in time, and yours is a year where they could be broken now, they don't last forever.. that will cause the fuse blowing, and the locks not working.
Check all doors, but most likely the Drivers door or Passenger door will be the culprit......

i have the same problem i think its a saftey hazzard when i went to start my car it was dead and the key would not come out and i couldnt shift it in (N) to move it even the button that u push to shift out of park didnt work