He's got a non-serviceable part missing from his steering rack. If he bought the car like that, my guess is the PO pulled it out because it was leaking and then discovered he fubar'd the rack.I think you mean the intermediate shaft, part number 92213664. Discontinued by GM.
I wondered about that, but there's nothing showing in the parts diagrams between the steering shaft and the rack. Those diagrams are a bit confusing anyway. I'll keep looking.