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  1. M

    AC stinks

    Just about to hit 2 years of owning. Ac has always been great. Used it today for about 30 minutes in as cold as it will go. I’d say it was semi cold in most but driver vents never got cold. Maybe cool then back to warm. Overall pathetic ac for it being only 75 out. Going to dealer soon and...
  2. M

    Weak AC

    Hit the one year mark today without a single issue. Until I got in. Around 80 today and the ac and ventilated seats did not feel like they did last fall. Seats I can hear humming but it feels as if nothing is happening. The ac itself works. But nowhere near as cool as it was. Will take it in...
  3. M

    Tire odd color

    Will get better and more pictures. But all of my tires, they are clean and it is not dirt, have these smudges on them. They look ugly. I have no idea what it is. It won’t come out, it almost is like they have Marks from all the potholes n rough roads around here? This normal? I’m going to...
  4. M

    Running boards stuck

    It’s been cold and nasty here but warmed today. My running boards got stuck last night half way up. They just will not budge. I don’t see any ice or snow. When I drove I cops hear the motor trying to raise it. Any suggestions on what to try? Thank you
  5. M

    2021 Yukon black screen

    Driving today and took a call Hung up. Screen is dark. Volume won’t work on knob or wheel. Turned truck off at arrival then back on. Black screen. Will try again later but has anyone encountered this? I’ve yet to have any issues. When I parked and backed up the camera appeared on the screen...
  6. M

    What oil for 6.2?

    For those who do their own changes could you recommend the best synthetic and type for me? Thanks
  7. M

    Do different drive modes disable cylinder deactivation?

    Since it seems we are still unable to do this on the 21s does anyone know if perhaps keeping it in sport would prevent this?
  8. M

    Driver door rattle

    I’ve tried searching all over and besides taking the door apart there aren’t too many answers. I guess next oil change I have them deal with it even tho I doubt their ability to fix either 2021 Yukon couple months old and the constant rattle and noise from the driver door is beginning to drive...
  9. M

    Engine issue mega thread

    I’ve seen many many posts about engine issues, lifters, time trucks have been in shop, mileage, etc. For me, a new owner, I would find it really helpful to hear from the community in 1 place. Hopefully all with issues could take a few minutes to participate and see if there are any common...
  10. M

    AFM disable

    Is there a way to do this on a 2021 10 speed without voiding the warranty? What products I have found do not seem to work on the 10. Have always disabled this on last vehicles. Thanks or dfm if that’s the actual acronym
  11. M

    New owner 2021 Yukon Denali

    Have wanted an upgrade for a while and kept my eyes on trucks heading into the dealers. Found what I wanted. Ultimate package. Everything. Some pictures, some thoughts and a question the question. Are there that many issues with this years engines? I’ve tried to see if there is a way to...

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