New to this Form and my fob won't lock my car :(

You are correct. That is the exact behavior that I'm dealing with. I agree, some leg work is needed.

So tonight the switch on the door panel has started working intermittently also. I can still here the clicking under the dash but will only lock with the fob and now the switch sporadically. I did forget to mention that I can even remote start it when the doors do not lock. Odd.

Passenger side lock intermittent?

Windows or side mirrors movement intermittent too?

I haven't had problems with either of them....so far.

I'll check the passenger side shortly.

Passenger side lock is also intermittent.

Alright, now we're getting somewhere.

All power locks are sometimes inoperative on all doors.

This may indicate that the lock control circuit is shorted to ground. Although, I guess a power short would do it, too.

Short to BCM (under panel under steering column) is possible.

I have similar problems with locking my car, a 2008 Grand Prix: the previous problems with the key fob were solved in general by purchasing a keypad from keylessfix.com. HOWEVER, not only do I have trouble LOCKING the car with the remote, I also often cannot lock the car using the switches on the doors, themselves. I actually have to go around to each door and manually lock them. I can easily UNLOCK my doors using the remotes or the door switches, and I can hear the car make clicking noises as it is trying to LOCK the doors, but only once in 100 tries does it actually lock...and, yes, IT DOES SET THE ALARM 100% of the time, so my wife winds up opening the door and setting off the alarm.