Author Topic: Fuel Sender Question  (Read 409 times)

Offline Tilleyman

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Fuel Sender Question
« on: October 12, 2020, 03:49:59 PM »
I have a '81 C10 shortbed with a H code 305. I need to replace my fuel sender but can't find anywhere whether it's a 2 outlet or 3.  I'd like to buy the new sender before I drop the tank and render my truck undriveable until a new sender arrives. Any input would be greatly appreciated.

Offline VileZambonie

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Re: Fuel Sender Question
« Reply #1 on: October 12, 2020, 04:18:16 PM »
All you have to do is look. You can see it behind the cab.
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Offline Bronze Knight

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Re: Fuel Sender Question
« Reply #2 on: October 12, 2020, 07:15:12 PM »
You can get the three outlet one and just cap it off with hose with a bolt in it or a rubber Vacuum end cap.

There is the send/pickup tube a return line and a vapor/emissions line. Depending on where you buy it the two outlet sender may be more expensive! The vapor/emissions tube is very short ends just inside the tank.
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Offline Mike81K10

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Re: Fuel Sender Question
« Reply #3 on: October 12, 2020, 07:26:08 PM »
I have an 81 K10 with duel 16 gal tanks and have 3 hose connections on the fuel sending units. Supply, return, and vent!
« Last Edit: October 16, 2020, 10:37:52 AM by Mike81K10 »

Offline Tilleyman

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Re: Fuel Sender Question
« Reply #4 on: October 15, 2020, 03:39:52 PM »
Thanks. It sounds like if I go with the 3 outlet I'm safe, because as you say, I can plug it if I have to. If I get a 2 outlet and need a 3 then I'm sunk.

Online bd

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Re: Fuel Sender Question
« Reply #5 on: October 15, 2020, 04:13:43 PM »
WOW!  How many fuel lines connect to the fuel pump?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Mike81K10

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Re: Fuel Sender Question
« Reply #6 on: October 16, 2020, 10:23:44 AM »
Three hose connections on the tanks fuel sending unit (I should not have said three outlets - corrected), there is only one fuel supply (outlet), a return, and a vent (outlet) needed. I would imagine you have two hose connections on the fuel pump (a supply and a return coming from the selector valve) and a threaded connection where a line connects that goes to the carburetor if it is like my 81 K10. I attached a pic of my fuel tank selector valve, a little dirty (the pic is prior to my rebuild and is OEM). Wish the same Selector valve could still be found, new selector valves are shorter in length and have a little different design.
« Last Edit: October 16, 2020, 10:47:30 AM by Mike81K10 »