OK, Bought a 07 with a couple problems today.

It is a 2007 Yukon XL Denali 1500. AWD 6.2L, 200K
It has the P0011 code and hot oil pressure is about 15PSI. Known when i bought it. It is in great shape with everything working except what could be a couple expensive problems im willing to fix.
1: VVT code P0011.
2: Rear shocks are blown. Pump is good.
Minor problems are.
1: All TPMS sensors read 148PSI but the scanner says all 4 batteries are ok.
2: Driving during the day it is very hard to see the dash gauges. I have to turn on the park lights to get the dash lights to come on so i can comfortably see the gauges.

Other then this stuff its in really great shape. Drives nice, No Dents, all glass good, No rips holes in the interior and other then a few rock chips on the front paint is good.
So tackle the expensive VVT first.
The engine does not make any strange noises but it was not cold and had been run from his house to the parking lot where we met.
After driving about 150 miles home with StabiliTrak warning coming on and off. No check engine light till i got into my driveway and it turned on.
Hot oil pressure is about 15PSI.
I have read a lot about fixing the VVT but nothing guaranteed to fix it.
I going to order the 3 new parts most replace and change them but,
I also notice the oil pressure gauge is really sluggish. From idle if i rev the engine to say 2K it takes a few seconds for the oil pressure to get up to 40PSI, when return back to idle the gauge will take maybe 7 seconds to return to 15PSI.
Im wondering if my engine has that screen and if so it might be clogged with gunk causing the sluggish gauge and possibly VVT not working properly?

I'd say plan to do an oil change and pull that oil pressure sender to inspect the screen. Might as well change the screen, or both it and the sender with OE.

See what the oil looks like and consider a used oil analysis from Blackstone or somewhere else.

Ohya. Changing the oil for sure next weekend. Did not even think to get a oil sample checked but good idea!.
Also have ordered a new GM Oil sender, screen and intake gaskets.

Welcome to the forum!! Hopefully you can get it all sorted out! Sounds like you got a nice rig! The rear air assist shocks are crazy simple to change out and the replacement air assist Z55 shocks are fairly inexpensive these days compared to what they used to go for. They ride really nice on the correct suspension parts. Post some pics of the truck when you get a chance…. We love pics around here lol.

@SpareParts
15 psi is not low
the VVT system is not problematic
my 07 6.2L did/does not have a screen under the sender.

This will help you fix the P0011. Don is correct that it's normally an extremely reliable system.
Sluggish oil pressure gauge and 15psi at hot idle are both normal.

Changed the oil today after work with new Royal Purple 5w30 and wix filter. Engine does not seem to make any funny loose noises and actually sounds good. No lifter tic ever, No piston slap or rod/main noise.
I let it warm up and idle for about an hour with little rev's here and there as i was doing other stuff.
I know it is not that accurate but i was to lazy to brake out the Solus Pro scanner so i used a OBD dongle and Torque Pro app.
After an hour running, Brought it up to 2K RPM's the oil pressure reads 38.7PSI. At Idle the oil pressure read between 5.8 and 7PSI. How accurate that is i can say as i did not have a mechanical gauge to hook up and it had started raining anyway.
Idle is rough and i can hear it missing out the exhaust but the app shows 0 misfires cold. Once warm it is smoother but still rough.
Fuel trims looked pretty normal so i don't believe its a vacuum leak. Maybe new plugs/wires? will fix that?
The biggest concern is Oil Pressure though.
Also i did not notice it but there is a small little ding above the passenger front time and the driver seat has a small tear where most do.

Couple more.

Nice looking ride.

Thanks. Drives and rides fantastic.
Im going to try and save it but im already pretty sure ill be putting an engine in it.