So I bought a 2012 RAM 3500.

It came already deleted.

I am new to owning a diesel and i don't know what else has been done to it.

I bought it from a dealer that got it as a trade in (so no help from them).

My problem is my RaceME Ultra tuner has no tunes installed.

When I plugged it in I hit the wrong button and sent it back to stock.

Now IDK what to do b/c the SD card has no tunes on it.

The truck is telling my exhaust is messed up and the engine light is on.

Any guidance for this newbie who screwed up would help.