Welcome and congrats! I really like that floor plan. Take your time on the pdi, if it opens, closes, turns on or off, have them demonstrate it and you return the demo. Test all doors, window, etc.. even boil a cup of water in the microwave (ours ran but didn't heat). As others said, pay close attention to the hitching procedure. Hook your emergency brake cable to the truck not the hitch like they will show you. I use the truck bed tie down anchor in my bed to clip it to. We also padlock the latch to our hitch closed. I was taught to paint the jaws of my hitch orange so I could make sure they were closed properly. Also learn how to do a pull test to ensure proper hook up before pulling out. (If you dont know what this is, just ask).
You will find it handles differently than your old tt. Cut your turns wider. A very wise person told me to wait until my truck rear wheels enter the intersection before turning. As for backing, it takes longer to start turning but once it starts it will turn quickly. You will not be able to straighten it back out while backing, just pull forward to straighten out. I strongly suggest practicing in an empty parking lot. Good luck and enjoy it!
2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6