Test Description

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

1. 2
   
   OFF is the normal state of the switch before activation.
2. 4
   
   OFF is the normal state of the switch before activation.
3. 5
   
   This step tests for a short to ground on the signal circuit.
4. 8
   
   After replacement of the BCM you must calibrate the new module for proper operation.
Fig 1: DTC B2527 Diagnostic Table (Steps 1-10)
Courtesy of GENERAL MOTORS CORP.