Iman,
I had the same problem about a month ago. The dealer in my area fixed it right up.
Also, a word of warning, there are (2) large "weatherproof" electrical connectors on the left side of the engine, rear of the exhaust. One of these passes the power (has mostly orange wires in it), the other passes control signals (has mostly blue wires in it).
I began having very erratic electrical issues (strange codes on the instrument panel, parking brake would trun on left turn signal, engine would cut out for no reason, ...) I began tracing wires and found that the connector with the blue wires, was full of water. They are mounted vertical, and it looks like water was running into the connector, along the wires from the top, but was then trapped inside. I researched the connectors that are made by Deutsch Connectors, and found that they should be mounted horizontal, according to the manufacturer. I called the dealer and they relocated both connectors, under the cab and mounted them horizontal as well. I have had no issues since.
HTH.