I have a 2000 Suburban with the 5.3L engine. It has 88k miles on it. Recently the coolant light came on. Looked at the tank and it was down about an inch. I filled it back up and a week later it was down again. The cycle continues...

There is no coolant on the ground and I cannot find a leak anywhere on the 5.3L engine. The engine still runs great.

Any ideas? suggestions? Is this problem the intake or the head gaskets? or something else?

Thanks,

Jeff