JimBe937
TYF Newbie
- Joined
- Oct 23, 2024
- Posts
- 4
- Reaction score
- 7
Hello everyone! First time poster and viewer!!
I have a 2007 Yukon Denali 6.2L with 255k named Big Bertha! She was gifted to me last year from a friend that was getting a new ride since I had helped with various problems through the years. My wife and I love her!! She's the most luxurious ride we have ever had!
Since getting her I have fixed some things I knew was broken and some I didn't know were broken. She had a terrible oil leak when I got her and the previous owner just kept throwing oil in it. I did some investigating and decided to take it to a local garage to have the rear main seal and oil pan gaskets and cooler gaskets replaced. The oil pressure reading would fluctuate from 0 to 80 and at times seem to work properly which pointed to the sending unit. I asked about replacing the pump too since they would be working in that area anyway. They actually refused and said putting a new pump in could hurt the engine since it was high miles.
That's my first question. How could a new pump hurt the engine? Doesn't the oil system come with a pressure relief valve so it can't actually cause too much pressure? I was miffed, but had them do the rest and she no longer leaks at all! This was fantastic. They also found a oil sender socket on top of the tranny. Score! I think they thought *I* dropped it there! I'm not that careless!
I keep getting random no oil pressure messages and to shut off the engine. Second question: Is this a result of the faulty sending unit? I know what low pressure sounds like and hear no signs of it.
So I bought parts to do the sending unit and dug in yesterday. First thing I notice. The intake ports in my engine are square and not triangular. Give me a 50/50 chance and I'll get it wrong! Annoying!
I unplug the sending unit and find I'm able to unscrew it with my fingers. Not easily, but it's certainly not tightened to spec. So I'm suspecting that the previous previous owner replaced the sending unit without removing the intake manifold and dropped their socket and settled for finger tight. Didn't appear to be leaking any oil. There was no screen under the sending unit as shown below.
I tried putting the screen in and it didn't sit low enough to allow the sending unit to screw in without crushing the screen! I lubed the oil ring on the screen and tried tapping it in. I even tried screwing the sending unit in some and could tell it was hitting the top of the screen. When I took the screen out the little legs on the bottom had started to break off from the pressure. So I eliminated the screen. I read that they added the screen in 2007. Third question: Is it possible mine was a pre-screen model which is why the screen wouldn't fit? Is there more than one screen size? If no to both, maybe the previous previous owner somehow messed up the channel for the screen.
Other misc questions I haven't researched yet!
When I press the button to open the rear most of the time it will go half way and then reverse to close again. Sometime it randomly unlocks the window in the hatch in this whol process. The reverse camera doesn't work. I suspect wires have broken or worn in the wire harness going to the rear. Do they sell a replacement or will I just have to hunt, cut, and patch?
Getting a suspension fault message.
Last! Meet my girl, Bertha!
I have a 2007 Yukon Denali 6.2L with 255k named Big Bertha! She was gifted to me last year from a friend that was getting a new ride since I had helped with various problems through the years. My wife and I love her!! She's the most luxurious ride we have ever had!
Since getting her I have fixed some things I knew was broken and some I didn't know were broken. She had a terrible oil leak when I got her and the previous owner just kept throwing oil in it. I did some investigating and decided to take it to a local garage to have the rear main seal and oil pan gaskets and cooler gaskets replaced. The oil pressure reading would fluctuate from 0 to 80 and at times seem to work properly which pointed to the sending unit. I asked about replacing the pump too since they would be working in that area anyway. They actually refused and said putting a new pump in could hurt the engine since it was high miles.
That's my first question. How could a new pump hurt the engine? Doesn't the oil system come with a pressure relief valve so it can't actually cause too much pressure? I was miffed, but had them do the rest and she no longer leaks at all! This was fantastic. They also found a oil sender socket on top of the tranny. Score! I think they thought *I* dropped it there! I'm not that careless!
I keep getting random no oil pressure messages and to shut off the engine. Second question: Is this a result of the faulty sending unit? I know what low pressure sounds like and hear no signs of it.
So I bought parts to do the sending unit and dug in yesterday. First thing I notice. The intake ports in my engine are square and not triangular. Give me a 50/50 chance and I'll get it wrong! Annoying!
I unplug the sending unit and find I'm able to unscrew it with my fingers. Not easily, but it's certainly not tightened to spec. So I'm suspecting that the previous previous owner replaced the sending unit without removing the intake manifold and dropped their socket and settled for finger tight. Didn't appear to be leaking any oil. There was no screen under the sending unit as shown below.
I tried putting the screen in and it didn't sit low enough to allow the sending unit to screw in without crushing the screen! I lubed the oil ring on the screen and tried tapping it in. I even tried screwing the sending unit in some and could tell it was hitting the top of the screen. When I took the screen out the little legs on the bottom had started to break off from the pressure. So I eliminated the screen. I read that they added the screen in 2007. Third question: Is it possible mine was a pre-screen model which is why the screen wouldn't fit? Is there more than one screen size? If no to both, maybe the previous previous owner somehow messed up the channel for the screen.
Other misc questions I haven't researched yet!
When I press the button to open the rear most of the time it will go half way and then reverse to close again. Sometime it randomly unlocks the window in the hatch in this whol process. The reverse camera doesn't work. I suspect wires have broken or worn in the wire harness going to the rear. Do they sell a replacement or will I just have to hunt, cut, and patch?
Getting a suspension fault message.
Last! Meet my girl, Bertha!