Test Description

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

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

Fig 1: DTC B0263, B0268, B0408, Or B0418 Diagnosis Procedure (Step 1 To 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B0263, B0268, B0408, Or B0418 Diagnosis Procedure (Step 3 To 12)
Courtesy of GENERAL MOTORS CORP.