Yeah, I know that it has to be done like you said. Just didn't know that you can change the oil pump without taking the oil pan off, but you can.I had a 2005 C2500 with the pre VVT 6.0. Little over 100k, not too sure of the maintenance history, but pretty sure oil was changed at quick lube places at OLM intervals. Very low oil pressure, verified with a mechanical gage.
Changing out the oil and filter did nothing.
As mentioned above, replacing the oil pump wasn't the trivial task of just dropping the pan. Front of the engine covers have to come off along with the crankshaft pully. With a new OE pump, o-ring, etc. nothing changed. Had too many projects at the time, along with an over full time job, so I sold the truck as is. My suspicion was excessive bearing wear, but never did find out what caused the problem.
Only AFM engines have that screen.I didn't see mention of the filter replaced UNDER the oil sender.
Yeah, I know that it has to be done like you said. Just didn't know that you can change the oil pump without taking the oil pan off, but you can.
The way I see it, if I go through the trouble to change the o-ring, would be stupid not to change the oil pump because you can access them both from the front of the engine, because that's an relatively cheap part IMO. And my buddy is a very skilled mechanic so no problem.
But yeah still debating on that.
That's how they do it on Youtube.. Lol.You cannot remove the Pick-Up Tube bolt from the oil pump without at least lowering the oil pan. This applies to all GMT800 & GMT900 platform trucks. Other platforms use the "upper" bolt hole in the pump body & can be unscrewed with the oil pan in place.
If you crack the oil pan loose.....It will leak from now on 'til you replace the gasket.
I'm sure someone has ground out the oil pan or pried on the pick-up tube, Hopefully you won't do that.
Is this just your own thought, anything to back it up?I don't believe the gauge is reading oil pressure at all. I think the oil pressure switch only signals the computer 2 or 3 pressure thresholds, and the computer just dials up the gauge to whatever it calculates pressure should be at that temperature and RPM as long as the sensor has met the expected threshold. If you really want to know the pressure, you have to put a mechanical gauge on it.
Not sure if that’s true, but in any case this is what the alleged screen looks like.Only AFM engines have that screen.
That is true. I didn't have it.Not sure if that’s true, but in any case this is what the alleged screen looks like.
View attachment 33190
It has been discussed on here in depth...years ago by people with intimate knowledge of it's workings.Is this just your own thought, anything to back it up?
I would like to know more about this, because seems like nobody on the face of the internet has solid information about this issue. Tiny pieces of a puzzle here and there, and you can't know which is accurate.
Amazingly no accurate information, as so huge number of people deal with this issue.
Somebody who worked/works in GM would be my best bet for accurate information.
It has been discussed on here in depth...years ago by people with intimate knowledge of it's workings.
I don't believe the gauge is reading oil pressure at all. I think the oil pressure switch only signals the computer 2 or 3 pressure thresholds, and the computer just dials up the gauge to whatever it calculates pressure should be at that temperature and RPM as long as the sensor has met the expected threshold. If you really want to know the pressure, you have to put a mechanical gauge on it.