gps

My factory Nav stopped working last weekend. CAL is displayed in the dash display and GPS displays on the NAV screen with a red line through it. I can't find any settings to run a calibration. Is there a process or do I have to take it in for service?

In brief...The Waze app is not functioning properly in the new 2018 GMC Yukon on the iPhone 7. It constantly reads "waiting for GPS signal...try going outside" Waze worked perfectly in my 2015 Yukon which I traded in last month, and it worked great on my iPhone 6s. True, there are many reported...

So I have a 2015 GMC 2500 HD Duramax Sierra Denali with the RP OI6 infotainment system in it. According to the Intellilink manual (page 68) I should be able to use my personal computer to create a .csv file containing GPS coordinates, names and descriptions then download them via a USB thumb...