1999 Chevy Suburban Cooling System question

I have a 1999 Chevy Suburban C1500 with a V8 engine with 215000 miles. It started overheating and it seemed that no water was going through the engine. Then we it appeared we blew a hose as we dumped a lot of fluid. When we opened the hood and started tracing the lines we found lines going to the heater and/or fire wall were ok but there were plastic t-fittings that were broken and the heater valve tubes were all broken. It was almost like they all failed at once. Since they were all broken, we have no idea what hoses go in what order and to what connectors. Is there a schematic that shows how all of this is routed?