2011 Buick lacrosse service suspension system message part 1

car drove in with C0580 :04 code

[@roggyrog5250]

Good job!

[@jaylee9972]

I appreciate your video, I have the same message on my 2011 regal. Did you ever find out what's that cylinder thing on side of the strut? I'm trying to replace my struts and nothing I find comes with that part.