The best you can do is to call up and get them to put a note in your reservation, requesting a specific model.

When you arrive, if they have allocated something else, take a walk around the facility and see if what you want is on site. If so, you may get lucky if it is not allocated to someone else.

A while back, this class of car had far more Equinox than anything else, but my recent observations from LAX and PHX are they have an event split of just about everything on Jzweighaft's list with the exception of the Terrain and the Flex which I've not seen for ages, and there are very few Edges.