Low Voltage Disconnect, Optional

The optional Sure Power Low Voltage Disconnect (LVD) system monitors battery power when accessories are being used while the engine is shut down. The system automatically turns off cab and sleeper accessories when voltage drops to 12.3 volts, to ensure that there is enough battery power to start the vehicle. An alarm sounds for one minute before accessories are turned off. If no action is taken within that minute, the LVD module will shut off power to predetermined cab and sleeper circuits. These circuits will remain off until the LVD measures 13.0 volts applied to the system, which can be achieved by starting the engine. After the engine is started, the system will reset.

Vehicles are equipped with an LVD label on the drivers-side sun visor, indicating the presence of the system.