Please help with codes!!!

[Houston Ben]

Ok, feel free to flame away at me but I stated this was the first time I have ever attempted anything like this and not really mechanically inclined. I started the truck and pulled out to the street where I let it warm up. While running I checked the tranny fluid and found I was approx. 2 qts low DOH!!!!My buddy has a 2013 and he told me how much fluid I needed per his book so that's what I did and it measured good.....until I turn on the vehicle.... Now she moves like she should But I still need to have the exhaust put on with the O2's correctly put in.