1992 Riviera carpet removal help
 

Hello. I have a FSM but it does not address removing interior parts unless it is to get access to something else. I cannot figure out how to remove the trim that goes from the kick panel to the rear seat along the door sills. In fact I do not see how to remove the door sills. I have done this on so many other cars including 90s Roadmasters, Fleetwoods, and 95-99 Rivieras. But I cannot see how to do it on the 89-93 Generation Rivieras.

Can anyone help me?