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.
- Ignition ON, mode set to the VENT position. Verify the blower motor operates properly with the blower motor switch in each speed position.
- If the blower motor does not operate properly in each speed position
Refer to Blower Motor Malfunction .
- Go to next step: If the blower motor operates properly in each speed position
- If the blower motor does not operate properly in each speed position
- Engine running, select each mode using the using the mode control. Verify the air flows from the correct outlets for each mode.
- If the air flow is not from the correct outlets for each mode.
Refer to Vacuum Control System Diagnostic
- Go to next step: If the air flows from the correct outlet for each mode.
- If the air flow is not from the correct outlets for each mode.
- All OK.