You know what? The more I listen to the GT theme song, the more I realize why ppl think that the cast sang it. After listening to it everyday when GT comes on, I see that it does sound like all of the cast members except Esther Rolle and Ralph Carter. It sounds like:

John Amos: "Anytime you need a payment" "Anytime you're out from under" "Temporary lay offs"
Janet Dubois: "Anytime you need a friend" "Easy credit rip offs"
Jimmy Walker: "Scratchin' and survivin"
Bernadette Stanis: "Hangin' in a chow line"

Then one of the kids running at the very end of season 1-3, from the back, reminds me of Michael. I think that this topic has been brought up before, but I didn't believe it before. I really am beginning to see it now though. :D

you just gave me a thought for a thread...thanx bansogirl