1983 K5 fuel sending unit

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MM83K5

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Location
NW, PA
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Mac
Truck Year
1983
Truck Model
K5 Blazer
Engine Size
305
On my 1983 K5, I am wondering about the ground wire connection at the sending unit. This is a mechanical fuel pump/25 gallon setup. Rather than disconnect the ground wire from the frame, I removed the wire at the sending unit. It seemed the wire had a female style spade connector. It was covered in dirt and when I wiggled it off the spade, the crimped parts of the connector broke off with the spade.

I was planning on reusing the sending unit as the gauge worked fine. Now 2 months later I am going to reinstall the tank after painting underneath, but am wondering how this should connect? It seems the spade must have been welded onto the sending unit? This was a picture when I removed it. The wire was connected to the blade in the 9 oclock area.. The way it is currently is to large to accept a typical female spade connector, so I am guessing it must have broke off the bottom side?

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NLD79K10

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Not sure if you've measured it, but it could be a 3/8" (9.5mm) spade connector, which is slightly oversized compared to the more common 1/4" (6.3mm) spades.
 

MM83K5

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Mac
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1983
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K5 Blazer
Engine Size
305
The part of the female connector on the wire that is still intact looks like the typical 1/4" size. It almost seems like there was a small tab welded on the end that broke off, but I didnt notice when I took it out.
 

Ricko1966

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You are correct it was welded. I'd take the wire loose at the frame clean and strip it drill a hole in the tab insert wire and solder. You can also crimp a small eyelet connector to the existing wire, drill a pilot hole in the tab and use a mechanical connection.( screw, small bolt and nut)
 

MM83K5

Junior Member
Joined
Jan 26, 2026
Posts
5
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Location
NW, PA
First Name
Mac
Truck Year
1983
Truck Model
K5 Blazer
Engine Size
305
You are correct it was welded. I'd take the wire loose at the frame clean and strip it drill a hole in the tab insert wire and solder. You can also crimp a small eyelet connector to the existing wire, drill a pilot hole in the tab and use a mechanical connection.( screw, small bolt and nut)
Great idea
 

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