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There is a service bulletin on that which involves reprogramming the theift deterent module. That will have to be done at a GM dealer, as they have the updates and equipment to do it. It should only take 0.2 hours, (labor time)
Here is what the bulletin states.
In addition, one or all of the Diagnostic Trouble Codes (DTCs) B1009, B2734 and B2947 may be set.
Important: This condition does not represent an actual system failure.
Important: The Tech 2 scan tool software version 20.003 or later (North American Operations) required for reprogramming the VTD Module is available from Techline on the TIS 6 Data CD and later.