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:

California Proposition 65 WarningRear Side Door Upper Front Auxiliary Weatherstrip Retainer Replacement
Rear Side Door Upper Front Auxiliary Weatherstrip Retainer Replacement
Callout
Component Name
1
Front Side Door Upper Front Auxiliary Weatherstrip Retainer (Qty:?€‰10)
Note: If the retainers are damaged when ...
Body Side Upper Front Applique Replacement
Body Side Upper Front Applique Replacement
Callout
Component Name
Caution: Refer to Exterior Trim Emblem Removal Caution.
Preliminary Procedure
Open either the left front or right front door in order to access ...
Front Seat Cushion Inner Trim Panel Replacement
Front Seat Cushion Inner Trim Panel Replacement
Callout
Component Name
1
Driver or Passenger Seat Inner Recliner Finish Cover Cap
Procedure
Use a flat-bladed tool to release the cap from the recliner cover.
...