James Siebers

I recently bought this yukon and right off the bat, i had oil leaks from the pan and the cooler block off plate. So because it has only been a couple weeks since I bought it, I brought it back to the dealer and they fixed the leaks no problem for free. But fast forward 2 days, (yesterday) I went to drive the truck and the service 4wd message came up. Okay, no big deal I said at first, I can still drive and I will take it in on Monday. So now today, 12-14-19, I got in to go run errands, and now the stabilitrak and the traction control is turned off. I tried pressing the button to turn them back on and nothing happens. Okay so now what I thought. So i started to back out of my driveway and I could tell right away something wasnt right. It felt as if it was in 4wd (meaning harder to turn, the feel of the power, etc..) so i took it around the block, and i could not get above 20mph at 2000rpm. So now im freaking out because I don't want to drive it risking breaking other stuff. So before I go and raise h*ll at the dealer monday, any insight on what is going on here??