IOU
SD Card error fix with IOU upgrade
With the GMC IOU upgrade, after install your SD card, if you get a Map Card Read Error, go to "Settings" the click "Return to Factory Setting." This will cause the map card to read.
IOU has blue screen and Cadillac splash after install
This is completely normal, as the screen will be blue, count down then give a Cadillac splash screen upon install install. This will not correct itself until the vehicle is restarted.
IOU Navigation Black Screen
If you get a black screen with only the vehicle marker (arrow) when you click on navigation, you will need to: Either turn off the vehicle and let it sleep for a few minutes. Or remove and reinsert the map card.
2019 GM IOU Navigation Splash Screen
2019 GM IOU NAVIGATION UPGRADE AFTER YOU INSTALL After you install the IOU Navigation Radio. Shut the car off and get out of the vehicle and close the doors. Wait 2 minutes, for the vehicle to sleep. Once you have waited the two minutes go back into ...
"SD Card Not Compatible"
First, verify that the map card is the correct year for the vehicle. If it is, the map card might need to be made "virgin" again. The vehicle's VIN number is written to these cards when they are inserted. To reset the card follow the below ...