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PostPosted: Mon Dec 02, 2019 8:51 pm 
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It is above the passenger side cv axle and below the power steering reservoir. I can't find the source.

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2001 SSEi.


Last edited by Ramcharger310 on Wed Dec 11, 2019 2:23 am, edited 1 time in total.

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 Post subject: Re: Guess this leak...
PostPosted: Mon Dec 02, 2019 11:34 pm 
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I would suggest power steering hose or axle seal. There's not much else back there.

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 Post subject: Re: Guess this leak...
PostPosted: Tue Dec 10, 2019 10:09 pm 
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I checked the hose coming out of the power steering reservoir. It is wet, but not dripping wet like this other part...

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Some sort of sensor that is super wet/leaking:

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 Post subject: Re: Guess this leak...
PostPosted: Tue Dec 10, 2019 11:09 pm 
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Probably the oil pressure sender, which is a known painpoint in these cars.

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 Post subject: Re: Guess this leak...
PostPosted: Wed Dec 11, 2019 12:40 am 
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RJolly87 wrote:
Probably the oil pressure sender, which is a known painpoint in these cars.



That's what I am thinking it is. Is this a simple remove old sensor and replace with new sensor deal?

The part seems cheap enough to DIY: https://www.partsgeek.com/1plxb66-ponti ... ender.html


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 Post subject: Re: Guess this leak...
PostPosted: Wed Dec 11, 2019 9:09 am 
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Ramcharger310 wrote:
RJolly87 wrote:
Probably the oil pressure sender, which is a known painpoint in these cars.



That's what I am thinking it is. Is this a simple remove old sensor and replace with new sensor deal?

The part seems cheap enough to DIY: https://www.partsgeek.com/1plxb66-ponti ... ender.html


Very easy to do.

Would suggest doing along with an oil change. If you remove the sensor prior to draining oil, it will lose oil thru that port. Not a big deal but easier to do with the oil drained regardless.


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PostPosted: Wed Dec 11, 2019 11:30 am 
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Very easy swap and you can get these parts at any local store.

Doing it with an oil change is recommend as without the oil filter, the access is a little easier.

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PostPosted: Wed Dec 11, 2019 11:48 am 
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Like stated above a pretty easy job with the oil filter off.
I bought a 27mm deep socket which made the job a lot easier.
Usually that sending unit goes bad and the oil pressure gauge reads all over.


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PostPosted: Wed Dec 11, 2019 3:35 pm 
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Yeah, that's another good point. The socket size is huge at 27mm. Lol I was able to use an adjustable wrench the now 2 times I've had to replace mine.

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PostPosted: Wed Dec 11, 2019 4:49 pm 
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27mm? Sounds like a good excuse to buy a new socket...https://smile.amazon.com/ARES-Retention ... B073WJ47R1

Also, should I go Duralast (cheaper & lifetime warranty) https://www.autozone.com/external-engin ... 862_0_1489


Or ACDelco (1yr warranty,but maybe better quality?) https://www.autozone.com/external-engin ... 7/936094_0


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PostPosted: Wed Dec 11, 2019 5:42 pm 
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I went with the Duralast.
It has a lifetime warranty.
I have already got 3 of them at N/C which I use on all my Bonnevilles.


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PostPosted: Wed Dec 11, 2019 9:49 pm 
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Year and Trim: 2002 Bonneville SSEi
Girlfriend's LeSabre had the pegged oil pressure gauge problem. Then one day it started using oil. When I changed the oil, I changed the pressure sender (it's right above the oil filter). It was pretty slimy so I suspect it was leaking. Engine hasn't used any oil since.
It was a bit of a pain, but I used an adjustable wrench. Took maybe 20 minutes to get it out due to limited area for wrench movement. I used the BWD brand sender from Advance Auto. It's been in since May and so far so good.


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PostPosted: Wed Dec 18, 2019 3:59 pm 
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I replaced the oil pressure sending unit on my 2000 SLE about 1,000 miles ago, and since then have not had to add a drop of oil. I had been going through a quart about every 800 miles from a slow leak some place or other or burning oil. But it now seems it was just leaking at that oil pressure switch. I bought the AC Delco one and a $6 socket to fit it from Amazon.

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