I just had my windshield cracked removed (gotta love zero deductible glass coverage!) and am rehabbing my dash before taking my car (E-body) to the shop for the install. The glass tech (safelite) had this tool with a screwdriver handle coming into a wide fork with two flattened ends, parallel and bent at maybe a 30* angle. The whole thing was rubber coated except for the tips. I had removed the end caps and lower strip before he arrived and left the clipped on trim pieces for him to deal with.

I watched him move that tool along the outside edge until he came to a clip retainer pin, then he straddled the pin with the tool, lifted up a bit and popped the clip off the pin. He did mangle two of the clips, but they have new ones at the shop. I imagine the later cars use a similar retention method.

Hope that helps.