I can indeed help with brake upgrades for your XL that would not only improve longevity and braking performance, but not cost a mint either. The retail price of an R1Concepts Eline series drilled and slotted rotor package matched with quality full ceramic brake pads is $423.94, but right now we are offering 15% off with free shipping on all orders over $99. That would bring the shipped price of the entire package for everything for the front and rear of your Yukon would be $360.35 out the door. I know this doesn't fall under the $200 budget range, but this is a 100% OEM replacement bolt on package that fits fine inside stock wheels, provide improved braking performance with shorter stopping distances, less brake fade under extreme braking conditions and will last a LOT longer than stock OEM replacement parts. The pads are made with a low dust low noise formula that all but eliminates brake dust on the rims and squealing. This package is truly the best bang for the buck out there.
Let me know if I can help further!