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SuperOldSchool

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    2015 Yukon Denali

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  1. SuperOldSchool
    Now at 151k. Plan to do a fluid suck and fill (no filter) in spring. Have changed fluid at 45k, 89k, 100k (temp sensor) and 130k. At the 130k (30k on fluid), magnets were clean and fluid was nice and red, thus just going to do a quick 5-6qt refresh in a few months… I did install the Sure Cool STL010 at 130k, so that should help the fluid’s longevity a bit…wish I had put the thermostat on long ago..
  2. SuperOldSchool started following 6.2 L86 cleaning throttle body , Who Has The Highest Mileage On Their 14+? , Highest mileage 8L90? and 6 others
  3. SuperOldSchool
    Can we get this one going again with some updates? 2015 6.2 151k. Hoping to clear 200k.
  4. SuperOldSchool
    Really waited long on doing this….. Cleaned it today. Zero issues with high idle or having to relearn the idle… I pulled the TB, gently opened butterfly and cleaned it out. Got a new TB gasket too. Pics in link below. Thread '2015 Yukon Denali - Cleaned throttle body today' : https://www.tahoeyukonforum.com/threads/2015-yukon-denali-cleaned-throttle-body-today.147839/
  5. SuperOldSchool
    130k on my 2015 8L90. fluid and filter changes every 45k. New temp sensor/harness at 100k.
  6. SuperOldSchool
    Isn’t this a high mileage thread? Why are folks just posting their current mileage, being well under even 100k? my 2015 XL Denali has 117k on it. Trans was replaced at 14k , so it alone has about 100k on it.
  7. SuperOldSchool
    It wasn’t structurally damaged, looked worse than reality. The flaking undercoating was the messy part. I’ll just check it each spring and clean it up. just sucks GM won’t use a durable metal treatment.
  8. SuperOldSchool
    My spare area was bad. Wire wheel/ brush and rattle can rustoleum primer and then paint.
  9. SuperOldSchool
    AAA replaced mine as well. He did a relearn for the windows.
  10. SuperOldSchool
    Had this done yesterday at dealer for my 2015. Covered under extended warranty, which will expire in about 500 miles. Seems to shift smoother than ever. Probably also due to the clean fluid. The sensor was wonky for the last say 15k miles, but not bad enough to throw codes. I had already drained and filled 8 speed on my own twice in the last 5000 miles (13 qts new fluid) then this - so the fluid is all fresh at this point. It only took 100k miles to get this thing shifting nicely !
  11. SuperOldSchool
    Thanks!
  12. SuperOldSchool
    These sprays will not clean the back of the plate fully - I’m talking about elbow grease and taking it off and not drowning it in fluid, but wiping got down with a rag. Too much cleaner will seep into the pivot pin and get into the inside. lucas287- have you cleaned THIS throttle body by removing it and moving the plate? You mention cleaning many over the years, but not specifically a 2015-2019. has anyone removed it, moved it to clean it up and not had any idle issues. Thanks!
  13. SuperOldSchool
    Here is a thread on my 39k and 94k mile changes on my 2015 Denali. Pics inserted to show amount of wear metals both times. Enjoy https://www.tahoeyukonforum.com/threads/2015-yukon-change-both-diffs-oil-and-transfer-case-fluid-early-on.94453/
  14. SuperOldSchool
    Thanks
  15. SuperOldSchool
    I’m very confused. There are tons of YouTube videos around having idle issues and having to relearn idle after cleaning ETBs. What are they doing to cause this that you are not doing? Some have no issues, others have issues and have to go through a relearn process. Just want to avoid having a problem and being stuck having to go to a shop. Thanks!
  16. SuperOldSchool
    I have yet to find a good video or description for cleaning a 2015+ throttle body. For this engine/ electronic TB, has anyone personally cleaned it? I know the plate should not be moved manually, so can you turn on ignition (not running) have someone depress the accelerator and will it open for cleaning? Are folks removing them to clean it? Again, lots of info on other years (older) , but what about a 2015+ 6.2? I have 94k on my truck and think it’s probably time to see if it’s coked up. Thanks!

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