I was wondering if it was possible to make the passenger side of the window a one-touch window roll up/down?? Can i just purchse another button like the driver side window and just replace it?

 

NO. Its actually a whole unit that controls it and is not worth it. Its cheaper to just get the 2 DEI 530T and have them wired in to your alarm. This will make all your windows one touch up and down. Cost of parts is prolly 160 and install is about 100 bux. Its an option when and if you get an aftermarket alarm. Im going to get my Viper 550 remote start and goign to ask them to do this for me.