Hi, I wonder how do you guys fix the squeaky doors? Mine makes a click like sounds because of the little roller that does not appear to be moving freely enough. I tried to liquid wrench it multiple times but with no major improvements. I know the dealers can do it well. But I wonder how they do it?
Thank you!

I use a dry silicone or lithium lube. Works great lasts long time.

How do you get it inside that little roller? Do you clean in there first? Any details are appreciated! )
Thank you!

This stuff is listed in the GM Service Manuals: Superlube or Superlube Dri Film
Cleans and lubes in one step..

I jusr spray liberal amounts using the little tube to concentrate the stream.

Ive used both superlube and lithium both work very well... use a finger on the roller when you use the superlube.
Also... not sure where you are located... but while your at it, take some silicone on a rag and do your door seals... they will not stick and tear the rubber when its below freezing.
Just thought I would add...

axle grease works well too!