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 WarningRear Side Door Replacement Panels
Rear Side Door ReplacementCalloutComponent NameWarning:Refer toSIR Warning.Preliminary ProceduresDisable the supplemental inflatable restraint (SIR) system.Refer toSIR Disabling and Enabling.Remove the rear door trim panel. Refer toRear Side Door Trim Panel Replacement.Remove rear side door check li ...