Automatic Door Locks

[Guest]

I have a 99EB. Is there a way to set the door locks so all the doors unlock when put the truck in park and turn off the ignition? Currently, only the driver side door unlocks. Its a real pain in the @ss when you jump out of the truck and go back to get something out of the cargo area and its locked. I looked at the manual and it has instructions for changing the autolock (to automatically lock all doors) feature, but I didn't see anything about changing the auto unlock feature. Even my 94 explorer unlocks all the doors when you turn the key off and release the brake..................

Thanks