Oil pressure sender

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Timmy adkins

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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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Poppy 87

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What engine are you using? What oil pressure gauge are you going to use?

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Camar068

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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).
 

Timmy adkins

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What engine are you using? What oil pressure gauge are you going to use?

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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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Timmy adkins

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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).


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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Poppy 87

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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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Timmy adkins

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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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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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Turbo4whl

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

Turbo4whl

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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.
 

Camar068

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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

yup. An expensive adapter (~$15-20). Might could find one locally for $5 with a little research on the block thread size/pitch.
 

idahovette

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

TubeTruck

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My '75 K15 also has a mechanical gauge
 

Timmy adkins

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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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clendon1

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My 76 c10 has a factory mechanical oil pressure gauge.
 

Madhorn

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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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