Oil Level Monitoring

CCM Monitoring Technique

The CCM monitors the engine oil level using a normally-closed grounding switch. The switch opens when the oil level is low. The procedure the CCM uses to determine a "Low Oil" condition considers many different variables and sequences of events, and is the same for both LT1 and LT5 engines.

To turn "ON" the "Low Oil" warning light, the following parameters must be met:

^ Oil temperature during the previous ignition cycle must have been at least 90.6°C (195°F).
^ Oil temperature must have dropped at least 40.6°C (105°F) since the engine was last running.
^ The Oil Level Sensor must be open, indicating low oil, when the Ignition Switch is turned "ON."

Verification of Oil Level

If the "Low Oil" warning light comes "ON," verification of the oil level with the Oil Level Indicator ("dipstick") requires a 10 minute wait with the engine "OFF" for the LT1 engine, and a 2 hour wait with the engine "OFF" for the LT5 engine. This waiting time is required for the oil to drain back into the oil pan from the various areas of the engine, and is especially important with the LT5 engine.