I want to replace my struts/shocks on my 2012 Eco last 7 of vin#C7231447. Do I need to replace the whole assembly (struts/springs)? If so, do you have the part numbers handy for the assemblies? I did not know that GM redesigned struts.If your vehicle came with the first design struts I would return those and then purchase the loaded ACDelco assemblies. This way you have the new springs after the strut redesign. Your next replacement you will be able to get struts only, where most manufacturers only list the newest designed part for. The price on the ACDelco's are extremely reasonable. I believe $80/piece when ordered a year and a half ago.