It's been a number of years since I installed a Prodigy, and that was in a Dodge P/U. Overall the instructions were good.
I would caution you to read carefully your manual on the Yukon's trailer tow capacity, others have posted that the found the TTC surprisingly low, after weighing their vehicle.
I'll see if I can find the last post on the Yukon.
In " Trailer Towing & Tow Vehicles " read the first post listed
"Tow Vehicle Sizing & Weight Calculators "
Then in the blue bar above , click " Search this Forum "
In the drop box enter " Towing Capabilities " then click search
Look for the post by " Master Gunner " on what he went through looking for a trailer to tow with his Yukon.