I am a GM man myself. Perhaps you can get something out of my tale:
Many years ago, my wife's Yukon chewed up a rotor after the wear sensor on some aftermarket front disk brake pads I installed fell asleep at the helm. For good measure, I replaced both front rotors with what the local autoparts chain store was selling.
Within 6,000 miles the steering wheel started vibrating during braking.
The rotors were then replaced with [spendy] Wagner, OEM rotors. And Wagner pads. She never had another problem.
would say, "Suck it up, spend the bucks, do it right the first time."