I have a ’94 6.5Lturbo charged 4x4 ¾ ton with what appears to be a sensor in a freeze plug. It is located on the driver’s side below the exhaust manifold. And has a three (3) wire connector coming out of it. Please see picture. I have a drip of antifreeze on it. I need to know what it is and how difficult it is to replace.
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Thanks

Block heater. Never changed one myself but wouldn't think them to tough to do. Pull off that old plug, buy a new cord and see if it still hisses when you plug it in. I wouldn't worry about a drip.Edited by: CanadianRigger

Looks like the block heater.

yeap thats a block heater easy to change but I would see if it works before I changed it. The oil pan heater would be a good add along with the block heater