Chevrolet Lumina coolant light stays on despite no drop in coolant level on Chevrolet Lumina

Some Chevrolet Lumina owners report experiencing issues with the coolant light staying on even when the coolant level is normal, which may indicate a faulty coolant level sensor sending false signals. Others have noted problems related to incorrect coolant mixture, which can also trigger the low coolant light. To address these issues, some owners recommend checking the coolant reservoir to ensure it is filled to the correct level, as a low coolant switch in the reservoir can activate the warning light. Additionally, inspecting the coolant level sensor can help determine if it is functioning properly; if unplugging the sensor keeps the light on, it may suggest a wiring issue or a malfunctioning instrument cluster. If the light turns off after refilling the coolant, it could indicate a simple low coolant issue, but it's essential to ensure the sensor is securely connected. Lastly, maintaining the proper coolant mixture is crucial, as using a 50/50 water and DEX-COOL mix can help prevent further complications.