i have a 2012 buick lacrosse without remote start.Can remote start be turned on?

If your car has the feature in it, yes it can be activated, and yes it is still quite expensive.

you can turn it on yourself but a gm dealer can quickly do it on your touch screen go to main menu and touch vehicle settings, you'll see the remote start app where u turn it on and off.......read u r manual or download it from the web