6.2 fuel sending unit advice
 

I have a cummins swapped k30 crew cab and recently my tank started leaking so I got a new tank and a diesel sending unit for the driver side. The problem I have is the new diesel sending unit has a ground wire attached to nothing in it and I have no idea where it goes because the old gas unit does not have the same wiring. Anyone have any idea where it should go? I dont like the idea of a wire just lose in the tank. and info would be greatly appreciated!

Re: 6.2 fuel sending unit advice
 

On my diesel 85 K30 the sending unit ground wire passes through the frame right around the back of the cab and attached to a stud on the inside of the c-channel there. Probably anywhere you can ground it to the frame would be sufficient.

Re: 6.2 fuel sending unit advice
 

Looks like an optional power lead for an internal pump, but I would drill a small hole in that flat bracket and put an electrical eyelet on it, solder it, and bolt it on.

Re: 6.2 fuel sending unit advice
 

What year did you specify for the new sender? 82-83 had the water in fuel sender in the fuel tank when they used the spin on fuel filters and would account for the internal wire.

Re: 6.2 fuel sending unit advice
 

I thought some of them used the same box filter in the intake valley as the 350 Diesel.
I wondered what the reasoning for going to that leaky abomination of the Stanadyne 80 box filter.

Re: 6.2 fuel sending unit advice
 

They used two spin on filters for 82-83. One on the firewall, one on the back of the intake.

Re: 6.2 fuel sending unit advice
 

Spin on filters are much less problematic than those box filters.
My '80s VW diesels had spin on filters and they just worked.
The Stanadyne 80 was an obnoxious leaky abomination.