Does a 1999 f250 disel come with a block heater?

A 1999 Ford F-250 Diesel may come equipped with a block heater, but it was often an optional feature rather than standard. Whether the vehicle has one depends on the specific trim and options chosen at the time of purchase. If you're unsure, you can check for a power cord near the front of the engine block or consult the owner's manual for more information.