Adding a powered rear lift gate was possible. I had to remove the existing wiring harness which unplugs at the floor in front of the driver's door and again on the passenger side floor in front of the door. Every plastic panel had to be removed and the headliner front dome lights replaced with a Denali one that controls fold up of two rear heated leather seats and actuates the rear lift gate. I also added four side curtain airbags but haven't gotten the airbag warning to shut down yet which will probably take some BCU programming. The gate, seat buttons, upgraded center console and 4 heated leather seats all work. I'm putting the new lifgate side panel in and adding the navigation stereo. In essence, use a junkyard upscale LTZ or Denali as your donor and be prepared to do a lot of work