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This has happened now 5 or 6 times, but it is getting more frequent and more concerning. First time was in Feb. 4 times in the last 2 weeks.

On occasion, normally after a short drive, with an equally short stop i.e. to the local grocery to run in and pick up a Rx. 6min drive, 5 min in store..
when I come out and start the car, the radio takes an extra second to turn on and when it does the screen has reset itself. All the icons are in a different place, but the radio stations and favs remain so it isn't a full factory reset.

Has anyone seen this?
 

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You may need to have the radio updated, there should be a software update for this concern. If you are out of factory warranty, you may need to pay for this update.

#PIC6158B: Cannot Delete Paired Phone, Phone Missing From Device List, HVAC Climate Button Lock Up On Display (Volt Only), HVAC Fan Speed Freezing On Display(Camaro Only), Navigation Address Entry Concerns (Encore only), XM Background Graphics Defaulting, Radio Freezes And/Or Resets - (Feb 15, 2016)

Some customers may comment on one or more of the following concerns;

•Phones cannot be deleted from the radio's device list once the list is full
•iPhone disappears from the device list without customer input
•Screen freezes on a climate control fan setting and cannot be changed until an ignition cycle (Camaro only) (Modes can be changed as designed, just the image on the display doesn't change)
•Screen freezes on a climate control function setting and cannot be changed until an ignition cycle (Volt only) (Modes can be changed as designed, just the image on the display doesn't change)
•Unable to enter some addresses manually, but they can be entered using voice recognition (Encore only)
•Occasionally the default XM graphics for the background screens will be used until the radio downloads the new Graphics from XM
•The radio display will freeze, go blank and come back on after a few seconds. The display may show the splash screen or come back on to the last screen that was displayed. The customer may notice a loss of radio control shortly before the concern occurs.
•The radio display may freeze for an entire ignition cycle. The display may be frozen on the wrong screen, be distorted, or have lines going through it when the concern is present. The display cannot be changed and normal operation will resume after an ignition cycle.

GM has updated the software to address these concerns.
 
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