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Navtool is an aftermarket replacement for the on board infotainment system. It lists for about about $800 USD but is sometimes on sale. Navtool highly recommend a professional installer as it is not an easy diy project. For that kind of money and if you really have to have a built in system then ask your GM dealer about an aftermarket GM upgrade which is available from an authorized GM supplier. When I priced it out it was about $1100 CDN installed. The firm as I recall is York Electronics and they have locations in Oshawa and Calgary.

The cheapest and simplest way to get navigation along with other features  as someone indicated earlier is to plug your phone into the usb slot in the console box or in my case, the usb slot behind the radio head on my C7. I have an iPhone and have installed on it  (1) Apple maps which came with the phone - not bad but not great. (2) Google maps - better but not perfect as some areas are outdated (3) Waze - which is probably the best but has a tendency to keep running and takes a concious effort to close it to avoid unnecessary data usage. With any of these the map shows on the screen in the dash and you get voice directions or you can mute it if you prefer.

As someone said earlier, you don't need the onboard wifi to use these apps thru carplay/android auto, you just need a good size data plan on your phone domestically. If you do a lot of long distance travel to the US say then onboard wifi may be a better choice than a roaming package from your cell provider. But you need to check and compare the cost with your provider.

One of the other benefits to enabling carplay thru the usb cable is you get access to any music you have installed on your phone, which is especially nice if you don't have siriusxm. Saves a lot of time tracking down a decent station to listen to as you travel in and out of range of stations. And of course having the phone plugged in to the usb port ensures that it gets charged.


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