any one know if you have to do a software update first before you install the latest 2014 navigation disc? I found the latest disc ($200) but read that it may not work with 05-07?
I will be going to my local GM dealership tomorrow and will ask them but thought others here may have some knowledge on this.
Thanks again
Pat
I will be going to my local GM dealership tomorrow and will ask them but thought others here may have some knowledge on this.
Thanks again
Pat
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