A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.Google+
Car Problem Reports
Chevrolet Express 2500 Leaking Water Pump May Cause Coolant Loss and Overheating
Chevrolet Express 2500 Problem
Engines Affected: 4.8L V8, 5.0L V8, V8
Visitor, 2006 Chevrolet Express 2500, 4.8L V8, 130,000 mi
Blown head gasket or cracked head
Looks to be leaking around water pump. Bought a new seal kit and am looking to see how hard this is going to be to replace.