2016 Chevrolet Malibu theft detection system malfunction. Dealer attempted repairs twice!

This is a 2016 Chevy Malibu that has an issue where the theft detection system will randomly go off. Customer says it will sometimes wake him up. The dealer has worked on it twice and charged the customer $600 and nothing changed. Has code B3006 in the BCM. Can we fix it? #mechanic #automotive #automechanic #mechanicshop #chevrolet #malibu #diy