Citizen Models - I can't select most faces.

Hi, I imported some of the hl2 beta citizen models into maya. It’s very strange, when I go to faces mode, nothing appears when I mouse over them. If I try clicking a face, it just selects the whole model. There might be about 5 faces on the whole thing I can actually select. I don’t see any greyed out transforms, so what’s causing this?

Also, if I fix it, will I have to put it back like this before I recompile?