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Old 03-13-2018, 10:19 PM   #11
andyh1956
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Join Date: Mar 2010
Location: thomastown mississippi
Posts: 1,261
Re: 6.2 fuel sending unit problems

The CUCV trucks had a "Fuel Management Center" filter on the firewall w/ fuel heater / water in fuel sensors in it.
I would bet the extra plug is for an in tank gasoline pump. The new senders are prolly universal in nature & use the same one for diesel, just w/ the pump omitted.
Just guessing here though.
I have a '86 one ton diesel frame left from a truck that I had a mini van drive up into the cab with me up behind the barn. Tomorrow I will go see if it still has the fuel tanks on it.
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