well you "had" one at some point. My 02 had one and i deleted it. 2001 Cummins drain plug screws right in place of the heater.
it never made a difference on cold start but will set codes once its undone. hell i was just in 20* weather up north over night and no glow plugs, no AIH, no block heater and it started right up with just a little coughing. pretty sure it coughed harder up there when it was a lb7, had glow plugs and stock injectors lmao
yes i know its an old post but Sean cant go on living without me telling him he had one :roflmao: