I did find a similar thread but did not find an answer to my question, I am trying to do my driver's side engine mount and I have the steering shaft disconnected from the steering box and both bolts pulled out of the intermediate shaft but I cannot get the intermediate to separate from the upper instead the whole upper piece tries to slide out of the firewall boot when I hammer down on the intermediate to try to separate it. At first I was thinking something might be broken the way it was sliding so easily cuz nobody else's videos seem to show it moving so freely but I finally found a video of the last gen Yukon where a guy was sliding the upper shaft piece back and forth. I gave up on it for the night but figured I should check on here and see if anyone had any tricks or knows if I was able to extend the upper shaft downward without damaging anything or if it would just fall out if I kept on hammering downward on it I used somebody else's picture for the one I am uploading because it's too dark to take pictures right now but the red circle is the shaft that is sliding in and out of the firewall in the directions I drew the arrows. Sorry this was a ramble on post I appreciate any help.