Low Oil Level
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
The driver information center (DIC) displays the LOW OIL LEVEL message when the powertrain control module (PCM)/engine control module (ECM) detects a low oil level condition from the engine oil level sensor/switch. The PCM/ECM sends a GMLAN serial data message to the body control module (BCM) requesting a low oil level message. The DIC receives a GMLAN message from the BCM requesting the engine oil level message.