How do I remove the headliner in my 1990 Buick Park Avenue?

How do I remove the headliner in my 1990 Buick Park Avenue? The material is still good but is sagging, can't I just take it out and re-glue it and re-install it?

First off, it would not be wise to reuse the old headliner material because the old material foam is probably deterioated and coming apart, it just won't stick well. Having said that, the question you asked is; how do I get the headliner out of a 90 Buick Park Avenue? We have many online headliner guides that will assist you in reinstalling your headliner, the one for you model is is the 1992 Buick Park Avenue headliner installation guide.