Inspection/Maintenance Description and Operation: Notes
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.
Some state/provincial and local governments require that a vehicle pass on-board diagnostic (OBD) system tests and the Inspection/Maintenance (I/M) emission inspection in order to renew license plates. This is accomplished by viewing the I/M System monitors on a scan tool and confirming that no Permanent DTCs are set.
The OBD II system monitors all emission control systems that are on-board. The OBD II regulations require monitoring of the following:
| Monitor | Diesel | Gasoline |
| Boost System Monitor - Since Diagnostic Trouble Codes Cleared | X | - |
| Catalytic Converter Monitor - Since Diagnostic Trouble Codes Cleared | X | X |
| Evaporative Emission Monitor - Since Diagnostic Trouble Codes Cleared | - | X |
| Exhaust Aftertreatment Monitor - Since Diagnostic Trouble Codes Cleared | X | - |
| Exhaust Gas Recirculation Valve/Camshaft Position Monitor - Since Diagnostic Trouble Codes Cleared | X | X |
| Exhaust Gas Sensor Monitor - Since Diagnostic Trouble Codes Cleared | X | - |
| Fuel System Monitor - Since Diagnostic Trouble Codes Cleared | X | X |
| Heated Catalytic Converter Monitor - Since Diagnostic Trouble Codes Cleared | - | X |
| Misfire Monitor - Since Diagnostic Trouble Codes Cleared | X | X |
| Oxygen Sensor Heater Monitor - Since Diagnostic Trouble Codes Cleared | - | X |
| Oxygen Sensor/Heated Oxygen Sensor Monitor - Since Diagnostic Trouble Codes Cleared | - | X |
| Particulate Filter Monitor - Since Diagnostic Trouble Codes Cleared | X | X |