I agree. Termination plug used more than likely under the hood or along the frame to protect an unused pigtail harness.Looks like a termination plug to me (blanks on the backside). If you have a plug similar plugged in somewhere, it wouldn't be needed.
@nanoghost do you have the plow prep package on your truck?Looks like a termination plug to me (blanks on the backside). If you have a plug similar plugged in somewhere, it wouldn't be needed.