gmlean brudda....they all have it. t-bar adj. and you should be good to go....you can do it...hellen keller with a broken arm could do it.

 

Note that your Vehicle is delivered on a Transport Truck and they grip those down pretty hard sometimes, so as noted the Torsion bar goes out of adjustment as well as leaf springs. I am surprised you didn't notice the lean at the dealer if it was that prominent. A full gas tank should not cause a lean ( thats kinka dumb). Most vehicles are setup to compensate for the weight of gas and driver. You might even say it is higher on the driver side when empty. You just bought it, take it to the dealer and tell them to fix it.