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Oil level chvy truck question . #8476504
09/26/25 10:59 AM
09/26/25 10:59 AM
Joined: Jun 2007
Illinois
foxkidd44 Offline OP
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foxkidd44  Offline OP
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Joined: Jun 2007
Illinois
I’ve tried googling and YouTube videos before I asked this question here.
Yesterday while replacing the starter.. the wires to the oil level sensor were pulled out of the plug.. snapped totally out.. I was able to locate a replacement and spliced it in..
Apparently something is wrong… either I wired it wrong, the plug is defective, or the sensor itself was damaged..because my low oil light keeps flashing.

My question is this… does this only tell you that you are low on oil,,, or does it mechanically affect something else in the motor?
If it’s just an indicator light problem,, I’m not worried about it…but if it affects something else I’d definitely like to know.. thanks guys.


Stand by your principles, Stand by your guns, and victory complete and permanent is sure at last.
Abraham Lincoln
Re: Oil level chvy truck question . [Re: foxkidd44] #8476511
09/26/25 11:08 AM
09/26/25 11:08 AM
Joined: Sep 2013
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Joined: Sep 2013
Green County Wisconsin
GM single wire oil pressure sensors are also prone to leaks

it tells you oil pressure

there isn't a level sensor in the pan , it just assumes no pressure = no oil

last one I replaced the sensor was 13 dollars so not bad. that was about 11 months ago

when you follow a GM product leaving a trail of oil drips , generally oil pressure sensor and almost always right over the starter , the leak also causes premature starter failure.


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Oil level chvy truck question . [Re: foxkidd44] #8476517
09/26/25 11:15 AM
09/26/25 11:15 AM
Joined: Nov 2014
S. Illinois
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Chuckles84 Offline
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S. Illinois
What is the year make, model, and engine. I cant remember from your previous posts


Your entitled to oxygen. Everything else is earned.
Re: Oil level chvy truck question . [Re: GREENCOUNTYPETE] #8476519
09/26/25 11:18 AM
09/26/25 11:18 AM
Joined: Oct 2009
east central WI
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k snow Offline
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east central WI
Originally Posted by GREENCOUNTYPETE
GM single wire oil pressure sensors are also prone to leaks

it tells you oil pressure

there isn't a level sensor in the pan , it just assumes no pressure = no oil

last one I replaced the sensor was 13 dollars so not bad. that was about 11 months ago

when you follow a GM product leaving a trail of oil drips , generally oil pressure sensor and almost always right over the starter , the leak also causes premature starter failure.



I thought I remembered a level sensor in the side of the pan, just forward of the starter.


Re: Oil level chvy truck question . [Re: k snow] #8476522
09/26/25 11:21 AM
09/26/25 11:21 AM
Joined: Sep 2013
Green County Wisconsin
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GREENCOUNTYPETE Offline
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GREENCOUNTYPETE  Offline
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Green County Wisconsin
Originally Posted by k snow
[quote=GREENCOUNTYPETE]GM single wire oil pressure sensors are also prone to leaks

it tells you oil pressure

there isn't a level sensor in the pan , it just assumes no pressure = no oil

last one I replaced the sensor was 13 dollars so not bad. that was about 11 months ago

when you follow a GM product leaving a trail of oil drips , generally oil pressure sensor and almost always right over the starter , the leak also causes premature starter failure.



I thought I remembered a level sensor in the side of the pan, just forward of the starter.

I stand corrected
however if he broke the pressure sensor cable , I suspect that is what is making the light come on.

it is worth fixing the sensor and getting the cable wired right as the first move, in my opinion


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Oil level chvy truck question . [Re: GREENCOUNTYPETE] #8476523
09/26/25 11:21 AM
09/26/25 11:21 AM
Joined: Jun 2007
Illinois
foxkidd44 Offline OP
trapper
foxkidd44  Offline OP
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Joined: Jun 2007
Illinois
Originally Posted by GREENCOUNTYPETE
GM single wire oil pressure sensors are also prone to leaks

it tells you oil pressure

there isn't a level sensor in the pan , it just assumes no pressure = no oil

last one I replaced the sensor was 13 dollars so not bad. that was about 11 months ago

when you follow a GM product leaving a trail of oil drips , generally oil pressure sensor and almost always right over the starter , the leak also causes premature starter failure.



Pete , this had 2 wires..
It’s below the starter this is how bad the wires popped out.

[Linked Image]

[Linked Image]


Stand by your principles, Stand by your guns, and victory complete and permanent is sure at last.
Abraham Lincoln
Re: Oil level chvy truck question . [Re: foxkidd44] #8476524
09/26/25 11:23 AM
09/26/25 11:23 AM
Joined: Oct 2009
east central WI
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k snow Offline
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east central WI
That's the level sensor. Did you accidentally get the 2 wires swapped when you spliced it in?

Re: Oil level chvy truck question . [Re: foxkidd44] #8476528
09/26/25 11:27 AM
09/26/25 11:27 AM
Joined: Oct 2009
east central WI
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k snow Offline
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K

Joined: Oct 2009
east central WI
To answer your original question, that is only a level sensor. Shouldn't hurt the engine to drive it that way. Unless you run out of oil.........

GCP, yes, the pressure sensors are a common failure on GM trucks. Carry a spare in the glove box and get good at swapping them.

Re: Oil level chvy truck question . [Re: k snow] #8476530
09/26/25 11:34 AM
09/26/25 11:34 AM
Joined: Jun 2007
Illinois
foxkidd44 Offline OP
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foxkidd44  Offline OP
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Joined: Jun 2007
Illinois
Originally Posted by k snow
That's the level sensor. Did you accidentally get the 2 wires swapped when you spliced it in?

It’s quite possible that I did wire them wrong..I’m just sore today and don’t feel like crawling back under there today and redoing it


Stand by your principles, Stand by your guns, and victory complete and permanent is sure at last.
Abraham Lincoln
Re: Oil level chvy truck question . [Re: k snow] #8476533
09/26/25 11:36 AM
09/26/25 11:36 AM
Joined: Sep 2013
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Green County Wisconsin
Originally Posted by k snow
To answer your original question, that is only a level sensor. Shouldn't hurt the engine to drive it that way. Unless you run out of oil.........

GCP, yes, the pressure sensors are a common failure on GM trucks. Carry a spare in the glove box and get good at swapping them.


the Olds mini van if the manifold wasn't hot , they were easy enough to change blind once you knew what you were feeling for

the first time was pull starter so you could see it as it sat right above the starter and below the exhaust manifold.
did that one in a parking garage in MKE


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Oil level chvy truck question . [Re: foxkidd44] #8476541
09/26/25 12:10 PM
09/26/25 12:10 PM
Joined: Jun 2007
Illinois
foxkidd44 Offline OP
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foxkidd44  Offline OP
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Illinois
Thank you Mr snow


Stand by your principles, Stand by your guns, and victory complete and permanent is sure at last.
Abraham Lincoln
Re: Oil level chvy truck question . [Re: foxkidd44] #8476542
09/26/25 12:11 PM
09/26/25 12:11 PM
Joined: Nov 2014
S. Illinois
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Chuckles84 Offline
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S. Illinois
Yep like everyone one has said that is the level sensor. The oil pressure sending unit is located on top on the block at the rear of the intake manifold. They are a very common failure on the 4.8/5.3/6.0 gm engines. Not bad to change out but is done mostly by feel since it is tucked back and hard to actually see.


Your entitled to oxygen. Everything else is earned.
Re: Oil level chvy truck question . [Re: foxkidd44] #8476760
09/26/25 09:27 PM
09/26/25 09:27 PM
Joined: Jan 2019
North central Iowa
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Bob_Iowa Offline
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North central Iowa
This may seem obvious but you do have enough oil in it? I’m not trying to be a smart butt, however I’ve seen it happen more than once.

Re: Oil level chvy truck question . [Re: foxkidd44] #8476923
Yesterday at 07:06 AM
Yesterday at 07:06 AM
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Very SE Nebraska
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Gary Benson Offline
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Very SE Nebraska
I had to get a longer dipstick cause it wouldnt reach the oil any longer.


Life ain't supposed to be easy.
Re: Oil level chvy truck question . [Re: Gary Benson] #8476981
Yesterday at 09:18 AM
Yesterday at 09:18 AM
Joined: Dec 2006
Sugar Grove, WV
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JTfromWV Online content
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Sugar Grove, WV
Originally Posted by Gary Benson
I had to get a longer dipstick cause it wouldnt reach the oil any longer.

Probably because it was used too much when it was new. cool

Re: Oil level chvy truck question . [Re: Gary Benson] #8477018
Yesterday at 10:37 AM
Yesterday at 10:37 AM
Joined: Mar 2018
Missouri
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HayDay Offline
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Missouri
Originally Posted by Gary Benson
I had to get a longer dipstick cause it wouldnt reach the oil any longer.


Yes, I was wondering what was wrong with the good old fashioned "oil level indicator"? Also known as a dip stick. An oil pressure gauge and dip stick will tell you all there is to know......and pressure gauge 100X better than the idiot lights so many engine applications use. Now doing some of my own engine work, coming to realize that oil is the life blood of an engine.....and oil pump is the heart that circulates it.

Once upon a time had a Jeep CJ with Chevy straight 6 that somehow lost a quart of oil per tank of gas.........now spoiled by Toyota engines that have as much oil in them after 5,000 miles as they did when they started.


Easy to vote your way into socialism, but impossible to vote your way out of it.
Re: Oil level chvy truck question . [Re: foxkidd44] #8477022
Yesterday at 10:53 AM
Yesterday at 10:53 AM
Joined: Jun 2010
Iowa
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The Count
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Joined: Jun 2010
Iowa
fk44 trying to beat the vechile question record set by cm220 back in 2016. laugh

Re: Oil level chvy truck question . [Re: JTfromWV] #8477033
Yesterday at 11:29 AM
Yesterday at 11:29 AM
Joined: Dec 2006
Very SE Nebraska
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Gary Benson Offline
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Very SE Nebraska
Originally Posted by JTfromWV
Originally Posted by Gary Benson
I had to get a longer dipstick cause it wouldnt reach the oil any longer.

Probably because it was used too much when it was new. cool

laugh


Life ain't supposed to be easy.
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