jasonthistle

For my fellow Canadians that can't get unlimited data from AT&T...Hopefully this explains why our data runs out so quickly. I decided to renew my data subscription so I could test a few things out and monitor the data usage. Before adding the 5Gb of data I turned off everything that potentially draws data including the Automatic Offline Map Updates in Privacy. I activated my data and went for a drive. The live traffic etc was working, however, I noticed the speed limit indicator in the HUD and dash was still blank. I was back in my driveway at this point and started playing around with settings. I connected to my home wifi so as not to burn up any vehicle data. I thought maybe the speed limit info is pulled from the offline maps (which I did not have any downloaded). I went to manually download an offline map for my area (Calgary, AB) and when the default map window popped up it had a good portion of Calgary covered, but not all of it, and the suggested download size was nearly 1Gb in size! How is this even possible!? After thinking for a few minutes I could not figure out why the map file was so large. What I discovered, almost by accident, is baffling. I usually use google maps with "heading up" or in perspective mode as opposed to "North up". I decided to switch to North Up and go back into the Offline Map and manually download the same map...the suggested download size in North up mode was only 40Mb...25 times smaller. The point of all this is that if you have your map set to perspective mode and your offline maps set to automatically update (as I did prior to this test) you will burn through your data plan in a matter of hours. I monitored my data usage today and the system still uses a good amount of data even with every setting possible shut off but not to the same extent that it did before. I'm not sure if this is an isolated glitch in the mapping software in my truck (and a few others) or more widespread. I'm going to connect with a tech at my GM dealer next week. Pictures attached. Happy Canadian Thanksgiving!

I'm in Canada too

I am having the exact same issue. For example…I bought 1.5Gb of data on Saturday at 5pm, drove to the lake (90 minute drive) and parked the truck. Did not use it again until 5pm yesterday…my data ran out 20 minutes into my drive. So that is 1.5Gb in 2 hours of driving. I knew something was weird because every time my plan renewed I would be out of data in a few days. Some of the Google maps functionality does not work without a data plan. I love the new system but it’s not worth it if you need to have a data plan and it goes through data that fast. And I have the system set to NOT allow my phone to use any vehicle data. GM and OnStar really need to address this issue and fast!