Low Oil Pressure?

DSPNDOFHLP

MEMBER
2002 CHEVROLET EXPRESS

Hello. I have a Chevy Express 15 passenger van with 130,000 miles. When I first start driving it, everything is okay and the oil PSI is about 40-60 PSI. Once I've driven for about 5 minutes and come to a stop, the oil pressure drops less than 20 PSI. After idling for a couple of minutes when the engine is hot, it drops to less than 10 PSI, the check gauges light comes on and the engine cuts off unless I press the gas. Also, when backing up, sometimes the engine cuts off, but it starts right back up. We've had the oil pump replaced and have also put a higher grade oil, just in case, but the problem is still there. What could it be?

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Sometimes this can be an oil filter that causes the problem. I only reccomend 3 different types. AC/PUROLATOR/ WIX those seem to be the most reliable. Then get a mechanical gauge and see if you get the same thing. If you do you could have a main/rod bearing problem but I don't think so. Don't waste your money on chemical treatments as they don't work. You could also have a bad oil pressure switch as that would cause the engine shutting down.

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Friday, September 17th, 2010 AT 5:21 PM

LILROCHEAD

MEMBER
18 POSTS
1999 CHEVROLET EXPRESS
V8
2WD
AUTOMATIC
111,000 MILES

Hi guys, I have a 1999 chevy express van 3500 v8 5.7 and my problem is that I have low oil pressure while on neutral but even worse if im stopped at a traffic light. But if I speed up and the oil pressure goes up and once in a blue it might shut off while driving. I was thinking I could have a bad engine oil pump but then again im not a pro, can you help?

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Thursday, January 28th, 2021 AT 9:45 AM (Merged)

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny
Here is a tutorial for you to view about low oil pressure.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

I've attached picture steps below on how to remove and replace the oil pan and oil pump on your Chevy Express van. Hope this helps and thanks for using 2CarPros.

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