Where is block heater on 2012 Dodge truck not the cord?

On a 2012 Dodge truck, the block heater itself is typically located on the engine block, near the oil pan. It is usually installed in a freeze plug hole and may be somewhat difficult to see without removing certain components. The block heater is designed to warm the engine coolant to facilitate easier starting in cold weather. To access it, you may need to look under the hood and inspect the engine block closely.