Removal Procedure

Remove the fasteners (1) at the rear edge of the insulator.
Push on the left and the right retainers at the rear edge of the insulators in order to disengage the insulators from the lower IP.

Fig 1: Removing Fasteners & Closeout/Insulator Panel Replacement - Right (RHD)
Courtesy of GENERAL MOTORS CORP.
Disconnect the electrical connectors (1,3).

Fig 2: Disconnecting Electrical Connectors & Insulator Closeout/Insulator Panel Replacement - Right (RHD)
Courtesy of GENERAL MOTORS CORP.
Slide the insulator (2) rearward toward the vehicle in order to clear the park brake bracket.

Fig 3: Removing Insulator, Park Brake Bracket & Insulator Closeout/Insulator Panel Replacement - Right (RHD)
Courtesy of GENERAL MOTORS CORP.