Weight Distribution Shank....2.5" receiver end X 18" Long

I don't like using the sleeve as a long term fix. Not sure a longer sleeve would make much difference.

Changing the hitch out is no easy or cheap task. Talked to CURT....the new GM receivers are part of the bumper system and all connects to frame. Aftermarket bumper brackets would be needed to add an aftermarket hitch.

I could try aftermarket sleeves to see if they fit any tighter.

I could have plates welded on the 2" shank to build it up to fit the 2.5" receiver. That may be the best option for a long term fix.