![]() ![]() We also have an OnStar subscription, and of course map apps on our phones if we ever get in a pinch and need help, so it's not a huge deal for us. Ours was a copy as others mention, but it was very nicely made and it worked just fine. For the price I was very surprised! No glitches, no interruptions, and worked like a charm! Quick installation in under 5 minutes, but it does recommend that you simply drive down a common area for a short time before it recognizes the updated info added to the navigation database, and it has a chance to recalibrate itself. Note: You must have either the original OEM CD, and/or at least have the original software installed and working in the vehicle before using the CD update. From what I can tell, you then keep the CD update 10.4v for 2012 in the vehicle instead of the OEM CD. So you would just store away the OEM CD with your manuals for when/If you sell the vehicle or if you ever need it again. The update will never work without making sure the OEM CD was initially installed in the vehicle. ![]()
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