Is there a diagram for air conditioner for a 1995 Chevy Suburban?

No. There really isn't going to be any variance between that system and that on other vehicles. It'll be a Fixed Orifice Tube system, and any diagram would be basic, and would look exactly the same for a Ford or any other make of vehicle with such an AC system. If you're looking for relays and electronic schematics related to your AC system, what you'd need is a wiring diagram.