Engine Oil Low Add Oil
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The driver information center (DIC) displays ENGINE OIL LOW ADD OIL message when the engine control module (ECM) detects a low engine oil level condition from the engine oil level sensor/switch. The instrument panel cluster (IPC) receives a serial data message from the ECM requesting display of the message in the DIC.