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Old 07-07-2016, 12:19 AM   #4
mpd659
 
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Drives: 2014 Chevrolet Camaro SS
Join Date: May 2015
Location: Melbourne, Florida
Posts: 206
OnStar does the monthly diagnostics the same day each month, I just unplugged it that day. If I remembered. Mainly just made sure it was unplugged when I took it to the dealership.
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