Test Description

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

2. Determines if the auxiliary HVAC door actuator is stalled.
3. Applies control circuit voltages to the input of the auxiliary HVAC door actuator.

Fig 1: DTC B0429 Or B3531 Diagnosis Procedure (Step 1 To 8)
Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B0429 Or B3531 Diagnosis Procedure (Step 9 To 13)
Courtesy of GENERAL MOTORS CORP.