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  1. Nautilus571

    Wow at the Pump

    I I clarify that the 6.6l is in my 26 Sierra 2500HD Ultimate. My wife has a 25 Yukon XL Denali with the 3.0l diesel. Can't beat more than 500mi to the tank!
  2. Nautilus571

    Wow at the Pump

    One of many reasons I love my 6.6l diesel! Prices have dropped more than $0.50 a gallon over the past couple of weeks. The membership clubs like BJ's and Sams are even a dollar less a gallon than that.
  3. Nautilus571

    Yukon Stopped While Driving

    DEF system maybe? It does have triggers built in that will affect driving ability.
  4. Nautilus571

    Any 25 Chevy Tahoe owners with reverse automatic braking

    Same here. It has happened several times in my 25 Yukon. And yes, it does scare the bejesus out of you!
  5. Nautilus571

    2026 Tahoe High Country Fuel Requirements

    I use premium diesel in my 25 Sierra 2500HD 6.6l...
  6. Nautilus571

    Aftermarket "Authoritative" Horns -- What Experience/Recommendations Do You Have?

    I would like to install the loud obnoxious train horn on my 25 Sierra HD that would use the normal actuator on the steering wheel. But I don't want to have to disassemble the entire front end to install it... guess I'm stuck with stock... smh
  7. Nautilus571

    No Audio For Radio - Sirius XM, AM and FM - FIXED FOR NOW!

    Sorry if I missed it, but how do I put the system in Safe Mode.
  8. Nautilus571

    No sounds

    My 2025 Sierra HD did this on me twice. I parked it, turned it off, let everything shut completely down (all this clicks and clacks) for about 30 minutes, started it back up and everything worked. What really blew my mind is the turn signal clicking is actually coming through the audio system...
  9. Nautilus571

    Question about supercruise

    Just bought the wife a '25 Yukon XL with super ceuise. It is truly pretty cool. Changes lanes automatically! Attached is the window sticker. Comes with 8, yes 8 years of Onstar basic. But... it looks like Supercruise requires an additional packege at $40/mo.
  10. Nautilus571

    Latest OTA update?

  11. Nautilus571

    Latest OTA update?

    So yeah, got the update message yesterday morning when I got to work. Accepted the update and went i side. After work I had the update complete message and went about my way. Everything seemed to work fine...until, thus morning. Got in the truck, started it up, and the radio wasn't working...
  12. Nautilus571

    New 2025 Z71 Diesel Owner – Excited to Join!

    2000 MPG! Wow!!
  13. Nautilus571

    New 2025 Z71 Diesel Owner – Excited to Join!

    In the past month I purchased two new GMC vehicles both being diesel. First diesels for me as well. I purchased a 2025 Sierra 2500HD Denali with a 6.6l Duramax for me, and a 2025 Yukon XL Denali with a 3.0 Duramax for the wife. So far no complaints. I just can believe the range indicated for...
  14. Nautilus571

    Automatic headlights - Sensor adjustment?

    Shine an LED flashlight on it. Will probably go to daylight and switch to night when appropriate. Just a thought.
  15. Nautilus571

    Another 6.2 failure

    Owners manual specifically states to use only premium grade fuel. Anything else will result in issues with the engine.... I have a 2019 Sierra Denali with 44k mi and the 6.2L L87. Love it. The only issue recently like in say the last several thousand miles is oil evaporation. Shortly after an...
  16. Nautilus571

    Cold Air Intake (CAI) on 2013 6.2L - worth doing?

    Just providing my personal experience using the CAI unit. About 2mpg improvme y in city. Again, just my personal observation.
  17. Nautilus571

    Rattle under dashboard!

    I see FB vidoes all the time where customers report rattles to the shop and it can be a.multitude of things such as an ink pen stuck.in the dash to.junk under the seat. Before you go ripping things apart I suggest you take a few minutes and a flashlight and do some investigating. You may be...
  18. Nautilus571

    Cold Air Intake (CAI) on 2013 6.2L - worth doing?

    I installed.a Cold Air Inductions CAI on my wife's 2021 6.2l Yukon Denali. I immediately noticed a better response and obtained a couple of more MPG. I average 16 city where before installng was barely at 14. And yes, it does sound more robust even with stock exhaust. I installed one on my 2019...
  19. Nautilus571

    Recirculation Issue

    Change the cabin filter maybe. Get a premium filter
  20. Nautilus571

    2021 Yukon RH tail light replacement

    Excellent! Thanks!
  21. Nautilus571

    2021 Yukon RH tail light replacement

    So... my wife backed into my son-in-law's pickup busting the lens on the right tail lamp. Found one online at a junk yard in Wisconsin. When talkimg to the salesman at the yard he mentioned I may need to have the truck flashed at the dealer. So, two things: 1. is there a sticky/video explaining...
  22. Nautilus571

    Seat Vibrations on 2023 Tahoe

    Gross!
  23. Nautilus571

    So this is what it's like to have a 6.2?

    Put it tow mode to get the best acceleration off the line. I have a '19 Sierra Denali with the Borla cat back package and a CIA air intake... OMG what a difference those two make. Never had it measured but I am sure I am pushing close to 445-450 hp. Love it!
  24. Nautilus571

    2021 Yukon Denali hard shift in Auto

    In the transfer case, correct?
  25. Nautilus571

    2021 Yukon Denali hard shift in Auto

    Yep... and just read a thread that Auto should only be used in foul weather. SMH. Although, I do have better control in Auto. It gets a little squirrely in 2WD.

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