“Low oil pressure” I’m stuck...

CDLute138 said:

Yes I did...been through the whole damn list lol


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CDLute138 said:

05 Tahoe.
210,000 on the odo.
New oil pump, pick up tube o-ring, OPS etc, etc.
Throws “low oil pressure” at idle and slowing, when I get on the gas (increase rpms) pressure builds as it should. I’ve been through the list and checked and rechecked to no avail...any ideas?? I’ve put a gauge on didn’t see it below 20 ever, (500-800rpms) which is low I know but from what I’ve read 6psi/1000rpm is in spec??


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afpj said:

What brand sensor? These rigs don't like aftermarket for a lot of the sensors...knock sensors and oil pressure sender being on top of the list iirc. What oil filter are you using? I've read some people having lower oil pressure because of a crappy filter

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YukonRog said:

How did the inside look when you replaced the pump? Could it have a clogged "artery" somewhere? Maybe sump screen? I think it should be higher. My '05 Yukon has nearly 40 psi at idle. I also agree it may be a bad filter, seen that before. Did you change oil viscosity? Just throwin out ideas.

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iamdub said:

20 psi at idle on a 200,000+ mile engine isn't so bad, if that is your actual pressure. The mechanical gauge you tested with could've been inaccurate. When you had the gauge on it and it showed 20 at minimum, did the "Low Oil Pressure" warning come on?

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