is there a way that doors unlock when put in park

thats a module you would have to ask for at your favorite alarm/stereo shop most of those small luxary's come from the manufactures stock modules such as self locking, seat memory driver and secondary driver, etc i have never heard of an unlocking module based on when you engage the transmission back into park being that it might create security issues but good luck and keep us updated on your search ^_^ Sincerely, Angel

if you go into the owners manual, there should be a way to do it. some vehicles have that option, most people just don't change the settings. I know I can set this on my 08 ram if I wanted to.

There is an option in the truck to set "auto unlock".