kind of a wishy washy post but for starters
no need to post in "other vehicles" under the skin these are all the same so just post in the right year.
I am assuming you mean your 11 yukon, in that case also presuming you have all the correct parts installed, then you would need to connect the tech2 to acdelco tdsweb and pay the $40 fee for 2 years programming, then follow the procedures to install the calibration for the backup camera.
the tech2 alone is not going to do it you will need to be connected to the internet, the tech2 should allow you to "test" the backup camera functionality presuming it see's it., but then again if there is no calibration for it then it might not.
this link may be helpful, about halfway down he goes thru the calibration procedure using tdsweb
https://chevroletforum.com/forum/tahoe-suburban-diy-useful-threads-61/how-adding-back-up-camera-07-c\k-suv-22756/