Thanks Tim. I saw that when I researched the old threads. I will keep Mongo in mind if my headliner requires more than the three I have. I looked through the assembly manual but found no document, suburban, truck or otherwise. If I have time today, I'll see if I can dig through the Master Parts Book.
I would guess that the headliner offered by Jim Carter and others WOULD NOT have the holes pre-punched? I would base my guess on how others have had to fit and trim their purchase ( as an example, when Weeds bought and installed his.) Otherwise, that could pretty much show how many were required.