Should (*should*) be no appreciable difference between a fleetside truck and a Suburban. The front end is 100% the same assemblies and bodywork, and the only difference in the rear is the brakes are larger than the lighter trucks (same brakes as a 1500 eclb by the way).. and the body width and wheelwell opening are same as a fleetside truck.
The one real difference would be the Suburban is more level at stock suspension height than a truck, so it sits lower in the rear; the drop kits for them generally take this into consideration when they're advertised for amount of drop, though.
I just looked back at your post and see you're planning a pretty low drop; if your Suburban has rear A/C be sure to watch out for interference at the hard lines back there - IIRC there's a potential for something to rub on them, maybe the leaf spring, or something. Vague memory. And you might reconsider the drop amount; 5/7 would be appropriate on a truck, but as I said the Suburban is more level so a 5/7 would be a tail-dragger.
Richard