Sorry, new to all this tuning stuff. So your 5* tunes have a specific tow tune? Or just a mode that can be switched with the tuner without loading a different tune? Or the factory tow/haul switch still works? Thanks for the help.
The factory tow switch will still work, but like the Off Road Mode switch, it will most likely over-ride the tune.
The 5* tune package that you will get from 5 Star will have several 'modes'. For example, economy, tow, performance, street, etc. You will tell them what octane fuel you will want to use (I chose 89 octane). To switch between the 'modes', or different tunes, you will have to first remove the previous tune and install whatever 'mode' (tune) you will want. It isn't like you can switch back and forth on the fly. Not a difficult process, but a little time consuming if you are switching it all the time.....
I generally leave mine set on one tune (mode) unless I am making a long trip, then I will change it to whatever I want.
Give the guys over at 5* a call and they can probably tell you more of the technical ins-and-outs if you need them.