Hey guys, so I bought a 2016 RAM 3500 with Aisin.

It already has a tune on it, but I don’t know who the tuner is, and no device came with the truck.

I want to put DRD tunes instead.

What do I need to do to be able to do that?

I have the old MM3 tuner with the old tunes for my previous 15 RAM 3500 that I had.

I understand I need to unlock the tuner and buy new tunes.

Will I be able to tune this 16 RAM even tho it already has a tune on it?

Or will I need it back in stock to be able to do that?

I appreciate any help you can provide.