Outter Liftgate Chrome Trim Panel Removal

The piece in the picture is the one I want to remove, I removed the four bolts on the innerside of the liftgate, but the piece is still tight as before and won't move, and I don't want to crack it you see it's plastic, only chrome plated. Please Advise!

I've already removed the interior liftgate panel, and replaced the actuator, but the actuator was not the culprit, it's the small release switch I need to access, and replace and it's underneath this chrome piece so I still have the interior panel off, and I see the four bolts in your first pic, and I removed them yesterday and the piece was still stuck on tight, I even put a hairline crack on the bottom part to the left of the left license plate light, but it's not really visible but it's still there, but I wonder if there are any pushpins, or friction fasteners that aren't in the diagram i.E. Your first pic. If you can find out let me know. Thanks, Chad Collier