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  1. SpThomass

    Idles at normal temp, but when I drive off it gets hot

    2006 GMC Yukon denali XL, LQ4 6.0 Weird little issue I’m having that’s happened three times now in the past two weeks. It idles perfectly fine, specifically between 204.4-206.8 degrees, no matter how long I idle it. The issue I have is that the moment I drive off after idling it gets hot. The...
  2. SpThomass

    Weird Issue Hard To Explain

    Hey guys! For starters I have an 06 Yukon denali XL, 6.0, 223k miles! i posted about this back in December, and it’s hard to explain, but basically when driving after a dead stop (red light or something) when going into second it just loves to hold onto first for some reason. Other than that it...
  3. SpThomass

    Does the winter/cold weather delay shift points?

    Hey guys, I got an 06 Denali Xl 6.0 and I’m pretty sure a 4L60e, I’ve read that it might be a 65 though I’m doubt it. my question is, and I don’t wanna sound dumb, but it’s my first winter outside of California so this is all new to me. Does the winter/ cold or whatever delay shift points? I...
  4. SpThomass

    Headliner measurements?

    For starters I have a 2006 GMC Yukon denali xl. I’m looking to replace the headliner with custom fabric and fiber optic lights to create a star effect. Plus the fabric is starting to sag and has come off slightly on some of the edges. my question is; does anyone know the measurements of the...
  5. SpThomass

    Which engine oil do you use?

    For starters I drive a 2006 GMC Yukon denali xl, LQ4 6.0. i wasn’t really sure wether or not to post this here or the engine/drivetrain category. So if this is the wrong place sorry haha. But I was just curious as to what kind of oil you guys use, I’ve been running royal purple for every oil...
  6. SpThomass

    What does your MPG look like?

    For starters I have a 2006 GMC Yukon denali XL, with a 6.0 LQ4 and it just went passed 216k miles. Normally I drive it like a 6 liter V8 should be driven haha but with everything going on I’ve been taking it easy cause money is a little tight lately. Anyways, I used to get around 12 mpg now I’m...
  7. SpThomass

    Did I cook my Trans?

    I’ll start off by saying I have a 2006 GMC Yukon denali XL, 6.0L LQ4, with a 4L60e trans. Yesterday I upgraded my stocktrans cooler to a Trucool performance trans cooler, all went well and I thought I was set to drive it the next day for an event. Anyways, earlier my husband and I were driving...
  8. SpThomass

    2015+ Escalade taillight on a 2006 Yukon Denali XL

    For starters, I have a 2006 GMC Yukon denali XL, stock LQ4 6.0L engine, body is stock as well. my question is, can you put the stock 2015+ Cadillac Escalade lights onto my 2006 Yukon denali XL? Also, yes I know that they won’t fit normally, they’re not the same size. However, if they’re was...
  9. SpThomass

    Vibrations at idle

    06’ Yukon Denali XL, 6.0L, AWD I’m just curious if anyone knows why it does this, or if anyone else experiences this. I don’t think it’s a very serious issue, and it could very well be the rubber engine mounts are on their way out. It just vibrates or like shutters I would say at idle. It’s not...
  10. SpThomass

    Spark Plug Removal Issues

    So I’m having a mad hard time to change my spark plugs, The ignition wires, and during the process the spark plug heat shields came off. Any tips ? Anyone have any experience with this or has encountered the same thing? thanks in advance
  11. SpThomass

    Power steering has left the building

    So I sound dumb I know, but I’m leaking power steering fluid, and im going to fix it in the near future, but the only part that I find confusing is the hydro boost. Do I have it? How do I know if I have it? Where is it? Any links for more information on it? thanks
  12. SpThomass

    Denali exterior door molding

    My 2006 GMC Yukon denali came with the door molding off on the driver door, I don’t know how to put it back on, and there isn’t anything online that I can find. Anyone know how to put it on, or a link someone can provide. Thanks
  13. SpThomass

    What’s your build ?

    I’ll be getting a new denali soon , and was thinking bout what I wanted setup on my new one, and it had me thinking; what kinda build do you guys have? What are the specs? Idk if I’ll be racing mine lol , i do want it to go fast but to me it’s more for the comfort and luxury aspect of it ...
  14. SpThomass

    Paint colors

    What kind of paint jobs do you guys have on your builds? Trying to figure out what kinda color I want on my next denali. I was thinking some blue variant, because while black looks dope af, it’s overused in my opinion.
  15. SpThomass

    4L65E Trans Is A Grenade Change My Mind

    Update On My Denali; My infamous Denali that I love and worked so hard for fucked me over Lmao. After about a month of driving it, I noticed I had to go into higher RPMs to switch into the next gear. I had our family mechanic check it out and well the transmission is hanging on by a thread. He...
  16. SpThomass

    Ideas Or Awarenesses

    Just bought my second Yukon XL, this time a denali, any coo ideas for it, or anything I should be aware of? Any things you guys have noticed on yours, good or bad?
  17. SpThomass

    2002 GMC Yukon denali XL

    Just bought my second Yukon XL, this time it’s a Denali. I got 22’s on it, should I lower it? Or how would the 22’s affect the current suspension?

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