Same issue 4 sets of front rotors Chevy dealer kept telling me they where warped. I bought 2 new orange 50 calpers, 2 GM heavy duty rotors the ones with the s grooves an Akebono pads. About $750-800 for all. 500 miles so far and no issues yet, smooth as silk braking. Dealer kept saying calipers were okay.
Akebono ASP1474 Performance Ultra Premium Ceramic Disc Brake Pad Kit
ACDelco GM Genuine Parts Disc Brake Calipers 84089038
ACDelco Specialty Performance Brake Rotors 19383609
Good reads:
https://www.camaro6.com/forums/showt...hlight=akebono
https://www.camaro6.com/forums/showt...hlight=akebono
They also sell caliper rebuild kits.