Oil pressure sender

[Timmy adkins]

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]

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

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[Camar068]

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]

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]

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]

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]

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]

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]

@Timmy adkins

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

 

[Camar068]

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]

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

 

[TubeTruck]

My '75 K15 also has a mechanical gauge

 

[Timmy adkins]

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]

My 76 c10 has a factory mechanical oil pressure gauge.

 

[Madhorn]

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