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 WarningTire and Wheel Assembly-to-Hub/Axle Flange Match-Mounting Wheel Hub
Note:After remounting a tire and wheel assembly to a hub/axleflange, remeasure the tire and wheel assembly on-vehicle runout inorder to verify that the amount of runout has been reduced andbrought to within tolerances.Mark the location of the high spot on the tire and wheelassembly as determined dur ...