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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This DTC may set as a result of other Passlock System problems. Diagnose any BCM DTCs prior to continuing with this diagnostic.
  2. 3. A DTC B3031 may set in the body control module (BCM) during the Password Learn Procedure.
Fig 1: DTC P1631
G01566628Courtesy of GENERAL MOTORS CORP.
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