99WhiteC5Coupe
Full Access Members
Check the hose connector at the bottom of the degas tank, they're a problem, the coolant line fittings on the turbos, also a common problem. My waterpump never showed any signs of leakage until the bearing failed and lost most of the coolant inside of a minute.
In addition to the water pump and a heater hose fitting, the degas bottle leaked on my 2015 Expedition Limited. All replaced by the dealer.