You are brilliant!!
Followed your advise and drained about one gallon from the bottom of the radiator, pulled the top hose - it sounded like a vacuum cleaner. Started the process over and went very slowly. Now it is full of coolant and no idiot light on.
New problem and maybe it should be a new post, but here goes. When I was done I went around to the back of the car and noticed some moisture on the ground at the exhaust. it is a humid night here (60%) and I started to freak out. Did I blow a head gasket in the process or is it just condensation?