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.
- Verify that all I/M System Status indicators report YES, and that no I/M Test DTCs are present.
- If any I/M Test DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no I/M Test DTCs are set
- If any I/M Test DTCs are set
- All OK.