At BigJacksAuto... As far as the 20 Min... It's what I do for a living. I'm a master tech and have been in the biz for 36 years. Price, Scored 2 brand new red calipers on ebay for $380. and for another $180 I got the Rotors hardware and pads. I did reuse the stock hoses and banjo bolts. A slight bend at the top braket of the hose is required.
You may be able to get a similar price through GMdirect for the calipers. I have a picture of the finish product in my pictures.

 

I had a brake pad disintegrate at about 30k, then a full replacement of rotors, calipers, and pads at 55000.

 

Same here pads around 30k and tires at 44k.