problem with my gm remote 15042968

I lost a remote to my truck - and had an extra - i programmed it and had to re-program one existing one also. The only problem I have encountered is that the driver's side door will not respond when I lock the doors. It will unlock (if I manually lock it) (as do all the other doors) but it will not lock with the remote. I can set the alarm.
I tried re-programming again...same result
Any ideas
:disappoin

I lost a remote to my truck - and had an extra - i programmed it and had to re-program one existing one also. The only problem I have encountered is that the driver's side door will not respond when I lock the doors. It will unlock (if I manually lock it) (as do all the other doors) but it will not lock with the remote. I can set the alarm.
I tried re-programming again...same result
Any ideas
:disappoin

It's not your remote that is bad. Does your door unlock and lock okay with the buttons in the vehicle?

yes the door locks and unlocks with the buttons - it just doesn't work with the remote