Test Description

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

2. This step tests for an inoperative auxiliary mode actuator in one mode positions or in the wrong mode positions from the front auxiliary HVAC control module.
5. This step tests for an inoperative auxiliary mode actuator in one mode positions or in the wrong mode positions from the rear auxiliary HVAC control module.

Fig 1: Diagnosis Procedure Air Delivery Improper - Auxiliary (Step 1 To 9)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Diagnosis Procedure Air Delivery Improper - Auxiliary (Step 10 To 18)
Courtesy of GENERAL MOTORS CORP.

Fig 3: Diagnosis Procedure Air Delivery Improper - Auxiliary (Step 19 To 28)
Courtesy of GENERAL MOTORS CORP.

Fig 4: Diagnosis Procedure Air Recirculation Malfunction (Step 1 To 7)

Courtesy of GENERAL MOTORS CORP.

Fig 5: Diagnosis Procedure Air Recirculation Malfunction (Step 8 To 14)

Courtesy of GENERAL MOTORS CORP.