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I left the trunk lid open on my 2015 XTS Vsport Platinum while away on vacation. Trunk light ran battery down. Jumped vehicle to get started but car only ran when key fob in special center console compartment. Once running no gauge pointers and all tail tale warning lights were on. CUE display system off but could be manually turn on with button. No time or temp on display. Error codes indicated loss of communication with BCM module
Local Cadillac dealership found faulty ground wire connection under battery case. Repositioned ground wire and vehicle was the fixed per their technical write-up.
When I picked up car, I noticed all XM presets were gone. Still had AM/FM presets. XM receivers tune fine but when I press and hold preset number you here display haptic response, but they will not store (no beep). AM/FM will store fine, you hear the display haptic and the beep.
Anyone run into this problem with their? I suspect there is a module that need reprogramed but interested in your comments,
I look forward to the feedback
Tried CUE , Hardware reset procedure. Did not fix issue
Cleared all vehicle DTC’s. Did not fix the issue
Had XM send refresh signal. Did not fix issue.
Next step??? Dealer???