- Buick Ownership
2011 Buick LaCrosse --- last 10 VIN are D7BF151941----Lost all audio the other day, suddenly.....no radio sound (radio and Nav screens video function fine), no nav sound, no turn signal click, no back up alert, no blue tooth cell phone audio etc etc. Then noticed on next day upon restart that it all worked for a few seconds, then all of it quit again. Same cycle repeats, so no audio when driving. Rear speakers crackle by themselves when car is off, but doors are opened. No codes are found with my hobbyist-level code reader. Have not found a TSB on this problem....is there one? Have seen similar problem reported on one or two other GM cars, but not seem root cause of failure. Any ideas/suggested diagnostics at home before making the expensive appointment?