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Oil pressure sender

Discussion in 'Engine Swaps (Gas) LS, Vortec, LT1 , etc.' started by Timmy adkins, Jan 22, 2020.

  1. Timmy adkins

    Timmy adkins Junior Member

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    First Name:
    Tim
    Truck Year:
    1979
    Truck Model:
    C10
    Engine Size:
    5.3
    I cut the oil pressure sender connector out of my harness because I thought the gauge on my 79 c10 was mechanical. Thought I didn’t need it. Low and behold, it’s wired! Now I have to wire a new up. To be honest, I’d prefer the oil pressure sender to be out of the harness anyways because it wires into the bulkhead on the truck and if I ever want to remove the harness I can just leave the connector there.

    The pressure switch is not wired into the pcm.

    5.3’s require a 100psi sender. Anybody have experience wiring a stand-alone oil pressure sender?


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    Last edited: Jan 22, 2020
  2. Poppy 87

    Poppy 87 Supporting Member Supporting Member

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    R10 Silverado
    Engine Size:
    305
    What engine are you using? What oil pressure gauge are you going to use?

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  3. Camar068

    Camar068 Supporting Member Supporting Member

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    First Name:
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    Truck Year:
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    Truck Model:
    K10/LM7 5.3/4L60e/np208/3.73/31"
    Engine Size:
    10 yrs Air Force
    I'm using the autometer adapter and the original engines oil sender. My gauge only goes up to 60 psi, dunno why you would need a 100 psi sender, especially since your sending to an old gauge (assuming).
     
  4. Timmy adkins

    Timmy adkins Junior Member

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    A 5.3 engine out of a 2000 Silverado. And I’m running the factory mechanical gauge in the 79 c10


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  5. Timmy adkins

    Timmy adkins Junior Member

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    Ahhh. So I can use the factory sender from the 79 engine (with the adapter)? I’m running factory gauges from the 79


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  6. Poppy 87

    Poppy 87 Supporting Member Supporting Member

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    Perhaps someone can correct me, but I don't believe that the squares had a "mechanical" oil pressure gauge. Thought it was either electrical gauge or an oil warning light that is also electric.

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  7. Timmy adkins

    Timmy adkins Junior Member

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    I think you’re right. Or at least what I’m seeing. There is a tan wire coming out of the bulkhead into the engine bay


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  8. Turbo4whl

    Turbo4whl Full Access Member

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    My '74 K5 with the factory tachometer option, has a mechanical oil pressure gauge.
     
  9. Turbo4whl

    Turbo4whl Full Access Member

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    @Timmy adkins

    Mechanical oil pressure gauges use a thin steel tube to run the oil pressure right to the gauge. No sender needed.
     
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  10. Camar068

    Camar068 Supporting Member Supporting Member

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    Engine Size:
    10 yrs Air Force
    yup. An expensive adapter (~$15-20). Might could find one locally for $5 with a little research on the block thread size/pitch.
     
  11. idahovette

    idahovette Full Access Member

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    My 75 K20 350 has a mechanical gage. Musta changed in 77-78 to electric?
     
  12. TubeTruck

    TubeTruck I like anything fast enough to do something stupid

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    My '75 K15 also has a mechanical gauge
     
  13. Timmy adkins

    Timmy adkins Junior Member

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    Truck Year:
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    Engine Size:
    5.3
    Mine is a tan wire coming out of the bulkhead into the engine bay. And the water temp is even electrical


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  14. clendon1

    clendon1 Junior Member

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    First Name:
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    Truck Year:
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    Truck Model:
    c10 stepside
    Engine Size:
    468 BB
    My 76 c10 has a factory mechanical oil pressure gauge.
     
  15. Madhorn

    Madhorn Full Access Member

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    Truck Year:
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    My 77 has a mechanical oil pressure gauge. Used auto meter adapter in the factory 5.3 oil pressure sending unit location.
     

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