Multi-Displacement System (MDS) (If Equipped) — 5.7L Engine Only

This feature offers improved fuel economy by shutting off four of the engine’s eight cylinders during light load and cruise conditions. The system is automatic with no driver inputs or additional driving skills required.

NOTE:
The MDS system may take some time to return to full functionality after a battery disconnect.

    See also:

    Rear Power Distribution Center
    There is also a power distribution center located in the trunk under the spare tire access panel. This center contains fuses and relays. Opening The Access Panel Rear Power Distribution Cent ...

    Extreme Cold Weather (Below –20°F Or 29°C)
    To ensure reliable starting at these temperatures, use of an externally powered electric engine block heater (available from your authorized dealer) is recommended. ...

    Disabling/Enabling HSA
    If you wish to turn on or off the HSA system, it can be done using the Customer Programmable Features in the Electronic Vehicle Information Center (EVIC). Refer to “Electronic Vehicle Informat ...