Hello I will help you with your question,
This sounds like the window is binding in the track or the regulator cable is binding and the regulator needs replacement.
Inspect the tracks and see if all the weather stripping is in place then let me know if you are going to try to change the regulator yourself and I will post the procedure.
Let me know what you need me to do to help you with this
Weather strip/rubber looks fine on both sides of window, do I have to take door panel off to continue?
Yes, the door panel will have to come off. You may be able to get a regulator module at your local autoparts store as some are stocked if you want to try to change it out. I would check before you take the door apart as you are likely to find a cable guide that has broken and the cable cannot pull the window closed.
You are trying to pull the window up while someone else works the switch for you?
If that will not work here is the procedure to remove the panel and the window module. Its in .pdf form so click the links provided below. Ckeck your glove compartment for the RPO code YE9 among the list of codes, let me know if it is there
Let me know whatr I can do to help you with this
I'm sorry the schematic was for 2500 gmc with 6.0 v8,
my yukon xl is a 1/2 ton 1500 model with a 4.8 litre
The door panel is the same if you have the YE9 code. That is why I asked you to confirm that you have this code in the glove compartment label