Just do it....yourself...if have the Tools and place to do it.
I just changed all four of mine...I am a disabled veteran and do not move to well.
But this was one of the easiest...changes I have done...I also use a Motive Powerbleeder to help.
I didn't need to replace the rotors...as they have less than 2000 miles on them, from the GM TSB change.
Just make sure to get some replacement...Caliper bolts...they are Torque to Yield...from the factory! Oh and get some Loctite 242 Blue!
I got my bolts from this place and they are really nice bolts!
https://screamingchicken.com/2016-21...caliper-bolts/
Some photos of the change!