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  1. Seamus

    NGK BR7EF Plugs on Stock Tuned 2013 Denali - now issues

  2. Seamus

    NGK BR7EF Plugs on Stock Tuned 2013 Denali - now issues

    I believe thats the exact plug my tuner wanted in my LS7 corvette. Its a track car. But it was tuned with them in the car. I think your problem is one of three things: 1. needs to be tuned for that plug (not likely) 2. Cracked a plug when installing it (pretty common) 3. Counterfiet NGK plugs...
  3. Seamus

    Stiff Husky and weather Tech liners solved

    Wow, I never want to have that problem!!! Good idea though!
  4. Seamus

    Favorite Floor Liners for Yukon XL 2022?

    I like the Husky texture and design better. I have had them on the last 3 trucks and find the fit and grip to be better.
  5. Seamus

    6.2 not a good idea because of issues?

    We had a 2013 suburban 5.3 2wd 118,000 miles when I traded it recently.....the best truck ever! Since new, it only required a master cylinder. They did have a AFM lifter issue, but with our maintenance nothing! Ran like a sewing machine. Considered a cam and lifter job to go the distance but the...
  6. Seamus

    6.2 not a good idea because of issues?

    There is no symptom. It's a failure. When it happens there is no doubt you will know. Engine light, misfire, loud tapping, engine shake, depending on intake or exhaust smoke from exhaust. When it happens, your stuck. When we were out in the middle of nowhere in Utah, Montana and Wyoming it was a...
  7. Seamus

    2022 GMC Yukon Duramax SLT - Subtle mods

    Looking Good!! We are looking for a slick top Dmax also. Hard find in a Denali trim 2wd. Too hot down here for sunroofs...they are greenhouses!
  8. Seamus

    Yukon denali short wheel or xl ....

    You guys do realize it has a surround view camera? The second I cross the threshold of my garage I hit the camera button with the front view and just pull up to the wall. Works perfectly, no gadgets needed. Even if you dont hit the camera button as you get close it pops on. I am so close I can't...
  9. Seamus

    Yukon denali short wheel or xl ....

    XL is the bomb. Plus it rides even nicer.
  10. Seamus

    Resale value - Will we see a disaster?

    Its an easy answer. Any markup you paid is out the window and the normal market will reset. These markups are paid by people paying extra to get what they want. It does not mean the vehicle is worth more. It will not translate to value. This has been the norm for many years with markups...you...
  11. Seamus

    6.2 not a good idea because of issues?

    Same lifters and issue with both motors. Last May we rented a 2021 Suburban to go cross country. The truck was being brought in from the airport rental store. As we stood in front awaiting here it came limping in. Yep brand new-- lifter went bad. We were packed and ready to go. Had to wait till...
  12. Seamus

    Real Life MPG 5.3 / 6.2

    Yep. That is what stopped me in my tracks. I heard the new active fuel management was greatly improved, and totally different and could run on 2 cylinders. We test drove and loved it. The mileage going down was very surprising. I just figured the new sytem was improved it would be better...
  13. Seamus

    Real Life MPG 5.3 / 6.2

    The new truck is such an improvment in so many categories. Beautiful highway cruiser. We test drove a '21 Denali 6.2 and were really impressed with the ride and truck. We had a 2017 Denali XL 6.2 which got pretty good mileage. Saw 24 mpg driving nice on hwy often, routinely 21-22 mpg. That...
  14. Seamus

    Canceled Yukon Denali Diesel Order Today

    100% correct. Living here 20 years now, never a shortage of diesel before, during, or after the hurricane. Gas is a nightmare when the storm comes. Several years ago 2 of my neighbors evacuated after being pumped up by the news. Neither made it out of Florida on gas. The second there is a...
  15. Seamus

    Not sure this is going to work out (considering selling after 3 weeks)

    Well I hear ya. I still miss my 2013 Suburban. I cant see going forward into the future with Gm and having Google in my car and tracking everything. I understand its damn near impossible to prevent most of this tracking these days, but Google is the worst. Agreeing to it, I just cant see doing...
  16. Seamus

    Canvasback Cargo Liner w/ Custom Detail

    We have been using Canvasback for years in several trucks. They are fantastic and high quality. Really protect the truck if you have dogs. The sides never hold on here in Florida due to the high heat. But no big deal the sides are plastic in the GM truck. Easy clean up from our drool monster. My...
  17. Seamus

    2021 Tahoe dead at 13,000 miles

    The LS based motors will go down in history as some of the best ever. I have had many. My last was a 2013. We actually went back to the Ls after so many LT ridiculous issues in 5 trucks. The Ls is confidence inspiring and can be taken anywhere without fear. There is nothing that cant be be fixed...
  18. Seamus

    6.2L Engine... What gas are you using?

    Octane rating needed is only to prevent knocking. So if you put 92 in a truck that only needs 87 to prevent knocking your wasting your money. The issue with modern cars is they have knock sensors. When your truck starts to knock it retards the timing to stop the knocking as it is very harmful to...
  19. Seamus

    duramax 3.0 fuel additive

    https://www.hotshotsecret.com/everyday-diesel-treatment/ Todays low sulfur fuel and not being able to find "TOP Tier" fuel station most of the time is my reasoning. I have used this for years on three different vehicles and never had an injector or motor issue. When I tow, I put in 2 ounces...
  20. Seamus

    Front seats comfort

    I have had several trucks, pickups and Yukon Denali from 2014-2017 generation and found the seats to be horrible and very uncomfortable. Actually needed a truck and bought a 2013 suburban because of comfort. Those seats were better. But needing a better tow vehicle and new vehicle bought the...
  21. Seamus

    Fool me twice?

    https://www.tahoeyukonforum.com/threads/2022-z71-suburban-6-2l-bent-lifters.131847/#post-1645755 Still an issue today. 3.0 all the way.
  22. Seamus

    Fool me twice?

    We rented a '21 Burb for 30 days w/o the air ride. I thought it was a fantastic ride. I came from a 2017 Denali XL, which I thought rode terrible. Im in a '21 3.0 Duramax and absolutely love it. I follow every little piece of info on this motor and it seems bulletproof so far. I would do it...
  23. Seamus

    How are thieves using OnStar to steal Yukons?

    There is a guy on the Duramax forum with surveillance video of the thieves doing this exact theft. They stole his 2021 Duramax HD using a laptop. What they are accessing? I dont know, it was alleged they catch your code when you use the remote to lock the truck?? They were in another car in the...
  24. Seamus

    2021 GMC with Bridgestones

    Great rims, easy to keep clean, I love them. The Bridgestones are terrible. My truck camw with them, and I removed them at 600 miles. Went with Michelin defenders and it took the truck up to another level. Had the same issue with my last Denali also, Bridgestones suck.
  25. Seamus

    Laura GMC

    I agree. We rented a 2021 Suburban for a month. Great platform for a smooth ride. Very much improved, the rear suspension really changes things. I had a 2017 Denali XL and it was night and day. Didnt like the pull buttons. Camera is insane! It is a BIG truck compared to the previous generation...

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