[Z71]

Only took about 1 hr to do my 2004 GMC truck. All they had to do was change a control box. Everything else stayed and you consent to give your current equipement they take out to GM in consideration for the free upgrade. Also, it takes 24 hrs for OnStar to complete the upgrade process and there are no refunds of the 1 yr service. If you buy another car, you cannot carry it over to that vehicle, its over.

Also, if you don't do it know, after Jan. 01, 2008 is will cost you a lot more to have it done. No free equipment or install.