Mine is running about 30 on hot idle and about 40 cruising. Just seen my truck was about 3/4 qt low when I checked it today. Once I do my own oil change and do the AFM delete I will see if my truck is burning that oil

 

where can i find a manual to see what my oil pressure is suppose to be on my '07 4.8l. i cant seem to find one easily on the web for some reason.

 

In your glove box? 25-60 lbs depending on temperature and rpm...

 

GM specs the oil pressure as minimums.
1000 rpm is 6 psi min
2000 rpm is 18 psi min
4000 rpm is 24 psi min
I don't have a good mechanical gauge, but set up my ScanGauge to read oil pressure.
35 at idle, 46 at 2000 rpm at normal running temp. Engine has 183K.
Last oil change was out of state and they only had 5-40 in full synthetic.
Changing to 5-30 GM spec.

 

I get 60 cold idle to 70 running cold. 40-45 warm idle to 60 running warm. Idle seems consistent to your numbers but upper end seems high. Good or bad?

That seems high... Even floored I've never seen mine go over 50.
Any other symptoms?

 

I have a 2007 Chevy Silverado at 160k miles. My eop psi is running about 60 when hot but when I put some pedal into it it goes up to 70 maybe even higher. What could be going wrong? It just randomly started happening. I just recently bought the truck but it was fine until today

 

I had issues with oil pressure on my 09 5.3. I couldn't get more than 38 psi cold or under a load and it would drop to 18 at idle. Eventually it would stick open and show no pressure at startup. I ended up replacing it with a Melling high volume stock replacement. After pulling the original one and doing a little research with it, I found that the pressure relief valve was scored on the side and was sticking open. Basically it's a small piston and a spring that controls the pressure. It could be that the relief valve on yours could be sticking closed. That would be the first thing I'd look at for high pressure issues.

 

Mine sits a little over 40 at idle/cruising rpm, under heavy acceleration I've hit 70psi.

 

2018 5.3 nearly pegs the 80psi guage under WOT. Assuming the guage isn't correct. Gonna put the scan tool on it asap

 

You have a variable displacement oil pump, read up on it.

 

My lm7 is cammed 228/236 .600 with pac 1219 springs, BTR pushrods and trunnion, new headgaskets and head bolts. Rebuilt 706 heads, and I see 60psi cold never rev it cold so idk above idle. Hot about 35-40 idle and 50-55 wot...

 

Mine runs at 750rpm 22psi then at 1500rpms 30 to 35 psi, above 2000k rpm 40 psi. You will get valve noise anything below 20 trust me had a oring on my pick up tube go out you thought it was about to throw a rod. Mine truck gauge on the cluster is off so hooked up a wet gauge shows the truth but gauge on the cluster was showing below the 20 mark like 15 psi or damn near zero. So say the stepper motor is bad cause when you unhook oil sending unit the needle is showing on the bottom where it says oil. But short answer is 20psi at idle is good for the 5.3

 

@jesse42303 FYI, that post is from 11 years ago and that member has not been on the site since.