2003 Chevy Avalanche Driver Window Issue

Hi,
I actually have 2 questions if you could help me.

The driver side window works to go up and down but poorly, sometimes struggling. It did even stop working once or twice a while back but then kicked in a while later. In addition it makes a noise while it moves (like crackling/rubbing- like sand/stone rubbing against the glass). There is no damage to the glass and I took the door panel off and there is no obstructions, so I am assuming a part may need to be replaced. Could you give me your opinion and what part, if any I may need.

The second question has to do with the axle joint areas. Front driver side, (when turning left). Sometimes while turning 45 degree I can feel a pop/ squishy type sqeek. Chevy looked at it but found nothing. I think it is the same feeling my husband described when he drove in 4WD and turned into the driveway, it felt like the truck jumped or drove over something that made it "bounce"/"jump". I am afraid to bring it to Chevy for a can't find anything and huge bill.

Thank you!