Low oil pressure warning alarm

Bruce Mace · Nov 16, 2020

I have a 2007 Yukon and was experiencing similar issues, after driving for 5 or 6 hours on the highway, arriving at my destination, the low oil pressure warning beep went off and the oil pressure guage was at zero. I immediately turned off the engine and checked the oil level, it was normal. I took it to my mechanic who first replaced the oil sending unit, did nothing, he then did a oil pressure test and found the pressure to be low. We decided it must be the oil pump, after spending $1000 to do that, the pressure guage still showed low pressure but was in acceptable specs . I continued to drive and the warning light and beep still go off after the engine is hot. I still am lost as to why this is still happening? It appears to be some computer malfunction?

wjburken · Nov 16, 2020

Bruce Mace said:
I have a 2007 Yukon and was experiencing similar issues, after driving for 5 or 6 hours on the highway, arriving at my destination, the low oil pressure warning beep went off and the oil pressure guage was at zero. I immediately turned off the engine and checked the oil level, it was normal. I took it to my mechanic who first replaced the oil sending unit, did nothing, he then did a oil pressure test and found the pressure to be low. We decided it must be the oil pump, after spending $1000 to do that, the pressure guage still showed low pressure but was in acceptable specs . I continued to drive and the warning light and beep still go off after the engine is hot. I still am lost as to why this is still happening? It appears to be some computer malfunction?

When he replaced the oil pressure sensor, did he clean the screen that is below the sensor? Have you put an analog pressure gauge on your engine to see what it is reading for oil pressure?

Jason in DLH · Nov 17, 2020

That’s what it was for me...the little oil pressure sensor filter needed a change.

Jason in DLH · Nov 17, 2020

Or a clean.

Save ya a few bucks.

Geotrash · Nov 19, 2020

When the oil pump was replaced, can you confirm that he replaced the little o-ring on the pickup tube? And if so, and you can confirm that the sender screen was also removed/replaced? If so, then the next likely culprits (in my mind at least), are the cam bearings, or possibly the retainer plate that holds the camshaft in place. There's a gasket on the back of it that can leak and also cause low oil pressure. You can pull the camshaft to check the bearings and also replace the retainer plate without pulling the heads or the oil pan. Can probably do the job in a couple of hours, in fact.

kbuskill · Nov 19, 2020

The gaskets/O-rings on top of the AFM solenoid towers under the VLOM/Valley pan could be bad and bleeding off oil pressure as well.

Pretty easy and quick fix. If your gonna pull the VLOM then you may as well replace it with the updated parts while your there.

Jeff Wilson · Dec 1, 2020

Also, there is an updated oil filter to be used with the 07 Denali.

Fless · Dec 1, 2020

Jeff Wilson said:
Also, there is an updated oil filter to be used with the 07 Denali.

Link to this "updated" filter, or documentation of what the update is?

Jeff Wilson · Dec 1, 2020

Fless said:
Link to this "updated" filter, or documentation of what the update is?

I will check the part # tomorrow when I am work.

Jeff Wilson · Dec 2, 2020

This is the part # my GM Tech stated is the updated oil filter for my 2007 Denali.

Low oil pressure warning alarm

Bruce Mace

TYF Newbie

wjburken

Jason in DLH

Cheeseburger and Fries

Jason in DLH

Cheeseburger and Fries

Geotrash

Dave

kbuskill

CAUTION I do my own stunts!

Jeff Wilson

TYF Newbie

Fless

Jeff Wilson

TYF Newbie

Jeff Wilson

TYF Newbie

Similar threads

Forum statistics

Latest posts

Low oil pressure warning alarm

TYF Newbie

Cheeseburger and Fries

Cheeseburger and Fries

Dave

***CAUTION*** I do my own stunts!

TYF Newbie

TYF Newbie

TYF Newbie

Similar threads

Forum statistics

CAUTION I do my own stunts!