Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
With Rear Auxiliary Controls
- Ignition ON, cycle the front auxiliary HVAC control assembly blower switch through the LOW, MED, and HIGH speeds. The blower motor should operate at all speeds.
- If the blower motor is inoperative, refer to Auxiliary Blower Motor Malfunction (RPO C36) , or Auxiliary Blower Motor Malfunction (RPO C69 w/o Rear Controls) , or Auxiliary Blower Motor Malfunction (RPO C69 with Rear Controls) .
- Rotate the front auxiliary HVAC control assembly air temperature control from the full COLD position to the full HOT position. The air temperature should follow the commanded states of full HOT to full COLD.
- If the air temperature does not change, refer to Air Temperature Malfunction - Front Auxiliary Control.
- Front auxiliary HVAC control assembly blower switch in the AUX position, cycle the rear auxiliary HVAC control assembly blower switch through the LOW, MED, and HIGH speeds. The blower motor should operate at all speeds.
- If the blower motor is inoperative, refer to Auxiliary Blower Motor Malfunction (RPO C36) , or Auxiliary Blower Motor Malfunction (RPO C69 w/o Rear Controls) , or Auxiliary Blower Motor Malfunction (RPO C69 with Rear Controls) .
- Rotate the rear auxiliary HVAC control assembly air temperature control from the full COLD position to the full HOT position. The air temperature should follow the commanded states of full HOT to full COLD.
- If the air temperature does not change, refer to Air Temperature Malfunction - Rear Auxiliary Control.
Without Rear Auxiliary Controls
- Ignition ON, cycle the front auxiliary HVAC control assembly blower switch through the LOW, MED, and HIGH speeds. The blower motor should operate at all speeds.
- If the blower motor is inoperative, refer to Auxiliary Blower Motor Malfunction (RPO C36) , or Auxiliary Blower Motor Malfunction (RPO C69 w/o Rear Controls) , or Auxiliary Blower Motor Malfunction (RPO C69 with Rear Controls) .
- Rotate the front auxiliary HVAC control assembly air temperature control from the full COLD position to the full HOT position. The air temperature should follow the commanded states of full HOT to full COLD.
- If the air temperature does not change, refer to Air Temperature Malfunction without Rear Auxiliary Control.