For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition
65 WarningBrake Rotor Assembled Lateral Runout Correction Disc Brakes Brake Rotors
Note:Brake rotor thickness variation MUST be checked BEFOREchecking for assembled lateral runout (LRO). Thickness variationexceeding the maximum acceptable level can cause brake pulsation.Refer toBrake Rotor Thickness Variation Measurement.Brake rotor assembled lateral runout (LRO) exceeding themaxi ...