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  1. Geotrash

    Leaking oil on a 2011 Chevy Tahoe

    I actually did document the oil cooler line replacement here. I replaced the left front wheel hub and the drivers side motor mount at the same time. https://www.tahoeyukonforum.com/threads/what-did-you-do-to-your-nnbs-gmt900-tahoe-yukon-today.44151/page-4276#post-1771420
  2. Geotrash

    Just joined from Vermont

    Welcome from Richmond and +1 to everyone saying to get the factory air suspension back up and running. Nothing better on the planet for towing with a big SUV than that setup. I have 2 of these rigs with factory rear air bags and tow a 7500 lb camper.
  3. Geotrash

    Bought core block

    Here is a little more info. Some are saying emery cloth is still too coarse but the consensus seems to be 400+ grit wet/dry sandpaper with mineral spirits or ATF wrapped around the journal will do the trick...
  4. Geotrash

    Leaking oil on a 2011 Chevy Tahoe

    Hundred bucks says it's the little oil cooler block-off plate/oil cooler line manifold right above the oil filter. They all leak there eventually. If it's the block-off plate, replace with an ICT Billet plate with the matcing o-ring seal. If it's the cooler lines, replace the gasket with OEM and...
  5. Geotrash

    Bought core block

    That will do two things: seep oil from the get go and wear out the seal prematurely. You could try some emery cloth to see if you can get it to clean up but based on that cam, I wouldn’t trust a thing that shop said.
  6. Geotrash

    AFM delete on Chevy Suburban

    How many miles? Any problems with the engine right now? Oil pressure at idle and while driving? This information is necessary to help us answer these questions for you. That said, if you're mechanically deleting AFM then you will need to change the camshaft. The factory AFM camshaft will not...
  7. Geotrash

    Need opinions: 3.42 vs 3.73 GR

    I tow a 7500lb camper with the 3.42 and the 6L80, and am completely happy. I run at 65 mph in 4th most of the time when towing because Nick Transmissions says that's the strongest path through that transmission. I'm turning about 2800 RPM with rarely ever a downshift needed, unless on a steep...
  8. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    A 4-corner steam pipe kit is overkill on these rigs, especially with the rears blocked off already. This will do ya: https://a.co/d/eItL1IS
  9. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Something else to watch for, I guess. Never seen anything like that. Glad you caught it.
  10. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    What’s a pregnant valve stem?
  11. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    It's a nipple clamp attached to a ba11 gag.
  12. Geotrash

    What is the best cold air intake for my yukon

    Gotta give the man credit for using the search function!
  13. Geotrash

    Lake Speed Jr, Oil Additives = Snake oil (video)

    My local lube shop added a can of BG quick clean to my '07's transmission before they did the fluid exchange, and before I could stop them. It is what it is.
  14. Geotrash

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Selling our house in CO and hope to pay off our house in VA. We’ll see!
  15. Geotrash

    safe RPM

    Yes, but why? Why not just use tow/haul mode and let the transmission do its thing? And why 6th instead of 7th or 8th if you're going to limit the shifting range? I pull a 7500 lb camper behind a 6.2 with the 6L80. I often run it in 4th at 2.5-3K at 65 mph in rolling hills because 4th is the...
  16. Geotrash

    Lake Speed Jr, Oil Additives = Snake oil (video)

    I suspect it's not a lack of lubrication so much as a lack of precision in the operation of the DoD system, and inconsistent metallurgy + machining in the parts.
  17. Geotrash

    Coolant leak Issues

    Those errors can be triggered if the computer thinks the engine isn't running right. Happened to me when I failing fuel pressure regulator (attached to the fuel pump in the tank) causing intermittently high fuel pressures at the rail. New fuel pump cured it in my case at 210K, but I suspect a...
  18. Geotrash

    Stripped head bolt hole

    Helicoils are used often on aircraft engines. They're actually preferred over bare threads in aluminum in some applications. They're plenty strong for the job on an LS head bolt.
  19. Geotrash

    [noise] drive shaft rubbing? - SOLVED

    Glad you got it sorted
  20. Geotrash

    Stripped head bolt hole

    One other thing to consider is to go with ARP head bolts when you put it back together. They are straight torque and not torque-to-yield.
  21. Geotrash

    Evap issue question 09 yukon 5.3? - SOLVED

    Yep. Without people doing that the canister would probably last the life of the vehicle.
  22. Geotrash

    Totally stumped have cmp question

    Well that sucks. Yeah, those bolts don't take much to break, unfortunately.
  23. Geotrash

    14 LTZ Shutter/shake/ vibration under light throttle

    That driveshaft play is pretty normal on these. I have that much play in my TC as well. What did the chassis ears reveal?
  24. Geotrash

    Squeaking noise STILL driving me crazy

    Only 2 places up there that will generate enough heat to sizzle spit: brake pad friction on the rotor, and failing wheel bearings. Given that your sizzle is when you touch the rotor and it's very unlikely that a failing wheel bearing would get the rotor that hot, I suspect you're looking at a...
  25. Geotrash

    Anyone “upgraded” from the tensioner style AC compressor to the stretchy belt?

    Interesting theory about core shift...I assume you mean while the block was being cast, yes? 0.100 isn't uncommon, which is probably about the thickness of the washers you used. The question it doesn't answer though is why it doesn't manifest for 100K+. I noticed in my case that it correlated...

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