MIL Operation
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The Malfunction Indicator Light (MIL) is located on the instrument panel.
MIL Function
- MIL informs the driver that a malfunction has occurred and the vehicle should be taken in for service as soon as possible.
- MIL illuminates during a bulb test and a system test.
- A Diagnostic Trouble Code (DTC) will be stored if a MIL is requested by the diagnostic.
MIL Illumination
- MIL will illuminate with the ignition ON and engine not running.
- MIL will turn OFF when engine is started.
- MIL will remain ON if the self-diagnostic system has detected a malfunction.
- MIL may turn OFF if malfunction is not present.
- If MIL is illuminated and then engine stalls, the MIL will remain illuminated so long as the ignition switch is ON.
- If MIL is not illuminated and the engine stalls, the MIL will not illuminate until the ignition switch is cycled OFF, then ON.