rws262

I changed the oil after my pressure went to zero, and oil pressure cane right back up and stayed. Took it to dealer anyway and they say that low oil was cause if problem and if I really wanted, I could change sender and screen but for $400. I opted not to and had ten apply GM tb to replace drivers side valve cover. Also, installed Range chip and sea-foamed intake, fuel and oil. Truck runs much better, with no oil pressure issues for a week. Going to change oil when it gets dark. Took off intake to see what manifold looked like and there's oil puddled up. Catch can is on the way.

Has anyone posted detailed instructions for the catch can installation on one of these trucks? Also, is Auto RX or sea foam better for cleaning out engine and trying to un-stick rings?

What else is there besides Sea Foam to help free the rings?

Quick update: after sitting for a week, I was able to change the oil and filter today. After changing oil, oil pressure went to 40 psi and stayed there. Drove it about 15 miles to dealership and stayed right around/little bit under 40 psi. Acting nothing like it was before. But I did notice smoke under hard accel and really noticed the black film on condensation out of tailpipe and a ton of carbon on exhaust pipe and bumper. My truck is at 107,770 miles. Is there any chance a dealer would goodwill overhaul or help me out? This thing has consumed oil for a while but there's no way I can afford complete overhaul.

What are my options if I am past the warranty period? A Range chip is on the way.

Taking into dealership this week. Hoping for something simple. This thing is consuming a lot of oil and I will be getting a Range chip to turn off AFM. What would a black oily film on the condensation coming out of the tailpipe mean?

How can I turn off the AFM?

Thanks for the reply. No leaks on the ground.

I've got a 2010 Sierra with the 5.3 AFM. Its got 107,000 miles, just over 3,000 miles on last oil change. Pennzoil platinum 5W-30. Oil in the correct range on the dipstick. The other day, kinda cold day, I started it up to get warm for about five-ten minutes. No issues. Started driving and get a few hundred feet and oil pressure gauge goes to zero, oil light comes on with message to shut engine off. I shut it off, then start it back up and oil pressure goes back to ~35 psi and then right back to zero within 30 seconds. It's parked right now. Is this a common issue and what else could it be besides oil pressure sensor?