Oil Pressure problem

deleted

To update, there's a Chevy Bulletin #PIP4682C - REPROGRAM ECM (Engine Control Module). Wish us luck!

Common complaint with that generation Duramax. It's unlikely to be the cluster, or the sending unit, they just suffer low oil pressure. Google it.

donn0128 wrote:

Grit dog wrote:

donn0128 wrote:
What brand and weight of oil? What brand oil filters do you use?

Lol, oil discussion? Has nothing to do with it.

Sure it does. If the motor calls for 10-30 oil and the OP is using 0-10 weight oil he could be seeing low pressure. If he is NOT using oil specifically called for for his motor he could have serious engine problems. If he is using the wrong oil filters he could already have destroyed his motor by clogging the oil pump pickup with filter paper. There are all sorts of horror stories about Fram filters falling apart.
More than likely his problem is oil pressure gage related, either the sending unit or the gage cluster. But until he verifies things this whole discussion is a cr!p shoot.

What is 0w10 oil? And not using oil specifically called for causing serious engine damage is laughable! Or my car that calls specifically for Mobil 1 0-W40 that has 135kmi running on mostly on sale 15-40 diesel oil is actually dead even though it runs great. Or EVERY vehicle and piece of equipment from 300T cranes to pickups to Rollagons that idled for 1000s of hours a year and ALL got fed the same exact Conoco oil regardless of spec, never blew up. I could go on.

Really freak you out when I vac out 50 gal of Hyd oil and replace it with basically Mazola corn oil for working an excavator in a river.

I believe the fram thing and don't use them, even though I didn't know it was a problem until the interwebs had been invented. Maybe lucky because I'm sure I used about 1000 of them before I knew they were bad. From lawn mowers to Med duty trucks. I'd buy a cart full of fram filters every month because they were the cheapest and my boss was cheap!
I do agree though it is most likely not the oil causing the issue.

Op didn't state whether 2007 classic or not but classics had cluster problems. Safest bet is a mechanical gauge to compare with. The hd gas motors also were known for pumps getting weak with miles . Don't know about the Dmax.

Lynnmor wrote:
Have the oil pressure checked with a reliable gauge, if it is low the engine may be spent.

You need to get a good mechanical gauge and plumb it in, even if it is temporary. I don't know what the spec is, but if you are below it, it is time for a new vehicle !

2Bargos wrote:
Not me personally,But a close friend has an 05 avalanche that was doing same thing.oil pressure gauge would drop to zero,warning light would come on and a check gauges warning would come on in the cluster display.

After much trial and error, his problem was in the instrument cluster itself.

Same thing happened to a friend of mines Tahoe.

Kept changing sensors, turned out to be the instrument cluster.

If this is similar to the gassers the pick up tube screen gets clogged. Turn it off debris falls off and good to go until the next time it happens.

If it was mine I’d run a mechanical gauge for a bit to see if there’s a difference between the 2 gauges. If not , drop the pan and clean it out and the screen. I

If you have a sludge problem I’d run the recommended oil and some tranny fluid through the motor to clean it out. Works well with detergents and lube from the tranny fluid.

Install analog oil pressure gauge. When the warning happens look at the gauge.

Grit dog wrote:

donn0128 wrote:
What brand and weight of oil? What brand oil filters do you use?

Lol, oil discussion? Has nothing to do with it.

Sure it does. If the motor calls for 10-30 oil and the OP is using 0-10 weight oil he could be seeing low pressure. If he is NOT using oil specifically called for for his motor he could have serious engine problems. If he is using the wrong oil filters he could already have destroyed his motor by clogging the oil pump pickup with filter paper. There are all sorts of horror stories about Fram filters falling apart.
More than likely his problem is oil pressure gage related, either the sending unit or the gage cluster. But until he verifies things this whole discussion is a cr!p shoot.