Got a little into this today. The radiator replaced by the independent dealer looks good. I wanted to take a look at the brake pads all around, found that the factory supplied lug wrench is 22mm, and the Velocity Wheels lug nuts need 19mm socket. So I added an expandable lug wrench to the tool bag along with a 19mm socket. Of course the factory lug wrench has a squared hole in it to use for raising and lowering, so that needs to be retained too.

So when trying to remove lug nuts/wheels to check the brake pads, most of the lug nuts wouldn't budge with my HF 1/2" drive electric impact wrench, which is rated 230-250 ft. lbs. So I had to use my 24" breaker bar and most of my strength to loosen those; the GM-specified lug nut torque is 140 ft. lbs. All the pads looked great, and I reinstalled the wheels and torqued to 140 ft lbs.