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  1. L8T BURB

    Looking to Come Back to the Family - 2022 Yukon XL - High Miles

    Hello all! As some may remember, I was the first member of the forum to swap in a 6.6 liter L8T into a 2015 Suburban. My ownership of that vehicle was less than ideal. I will quickly map that out, as I feel it is an important backstory and may guide the topic of discussion. 2015 Suburban w/182k...
  2. L8T BURB

    Dreaded Effing lifter tap...... - SOLVED

    Since you're talking about the Mazda CX-50, I feel I should chime in. As I moved on from my Suburban, I also had the realization moment that I didn't necessarily NEED a massive 3 row vehicle. I also drive a lot, usually in the range of 15k to 20k per year taking kids to/from ball practices...
  3. L8T BURB

    Dreaded Effing lifter tap...... - SOLVED

    Good news that you got it running back smooth again for what seems like a low cost. As for me, I would ship that thing out as quickly as possible. You've got the right idea to let things marinade for a couple of days and talk it over with wife and determine best steps forward. Lets say you land...
  4. L8T BURB

    Engine Upgrade 2017 ppv

    Do some research on the 6.6 liter L8T engine. It is (in my opinion) the absolute best replacement engine choice for the 2015+ platform. It is the epitome of plug and play. You can reuse your stock ECM, wiring harness, exhaust manifolds, front accessory drive, intake, etc. It can also be paired...
  5. L8T BURB

    Idea On Cost To Replace 5.3 Engine? 2015 Yukon XL

    For a more directly compatible engine that brings more power, and non-AFM, I strongly suggest the 6.6 liter L8T engine. It is direct injected, and is the most true "plug and play" swap in the 2015+ platforms. I have a build thread on here with extensive details on the swap into a 2015 Suburban...
  6. L8T BURB

    Leaving Ford Expedition Behind

    I am glad to see that you're making warranty a priority. From what I have heard from my local dealer who sells Chevy and Ford at the same dealership is that the Ford Care ESP is the best manufacturer backed program on the market. This was from speaking with the service managers of both Chevy and...
  7. L8T BURB

    Dreaded Effing lifter tap...... - SOLVED

    If the cost in repairing yourself is $2400, but you can source a 6.6 L8T for just $1100 more, most definitely I would recommend the 6.6 route. Since you'd be keeping your stock transmission, no need for a custom driveshaft. It would be a VERY straight forward swap. Only added cost would be...
  8. L8T BURB

    Coolant Temp Sensor lasts about 30 days

    This will sound far fetched, but trust me before you go throwing big money and time at this. Replace the thermostat with a GM genuine part, and also the temperature sensor with a GM genuine part as well. I'd bet the house that the thermostat is the problem, but the coolant temperature sensor...
  9. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    100% agree. The engine is massive and I feel like it could easily stand more workload, especially if it would take some stress away from the transmission.
  10. L8T BURB

    2022 YUKON DENALI 6.2

    If you're having to pay for the replacement engine, go with the 6.6 L8T engine. It is made without AFM lifters. It is essentially a stroked and stronger 6.2 but can run on 87 octane. It is the engine that GM started using in their HD trucks in 2020. It would bolt right up to what you've got...
  11. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    Good point! Thankfully I am used to driving smaller vehicles. I have had several Toyota Camrys and a Toyota Avalon in the past. They've been my favorite vehicles. I REALLY deviated from my norm with this Suburban lol! What kept me from a Rav-4 was the price to get the features on my Escape...
  12. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    I would say that's a very fair statement. I would imagine more rear gear would get it up to speed with even less effort... but as for the impact that would have on MPG... I am not too sure as I have no experience with changing rear gearing and seeing the effects.
  13. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    On interstate and state roads 55MPH it did good. I could occasionally get it to 25-26 MPG if I ran 55MPH and REALLY focused on hypermiling. It took a lot of work. Average for 70MPH interstate travel is around 21MPG. In town is a TOTALLY different story. I was seeing around 13MPG in town...
  14. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    This may be an unpopular opinion here, but I will try to map out my feelings on this. The Suburban was fun to drive, a killer looking vehicle... however I had grown such a feeling of resentment towards the vehicle. Realizing that despite it being a unique build, at the end of the day, I had...
  15. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    SOLD! Thanks to everyone here for your awesome words of encouragement during this build. I am hopeful that I have helped open up an avenue for people with engine failures to have a viable engine replacement that corrects all the shortcomings that the 5.3 and 6.2 engines have to offer. Remember...
  16. L8T BURB

    6.6 Swapped 2015 Suburban

    As the title states, I have my beloved 6.6 swapped 2015 Suburban for sale. I am posting a link to the listing on marketplace. I feel the listing clearly maps out all details, but please don't hesitate to reach out with any questions. I can be reached via phone at 859-585-5074. Location is Mt...
  17. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    Hey all!! Listing is active in marketplace. Please share on your social media if you don't mind! Would happily send a finders fee to any of you guys!! Plan is to have this listing active for 30 days then depending on the activity, pursue the bring a trailer auction listing...
  18. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    I always look forward to your responses lol! I am not in a rush to sell. Jokes aside, what would your rough idea on listing price be if this was your rig?
  19. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    UPDATE I have officially decided to sell the Suburban. I was wanting to get some meaningful opinions on a reasonable list price? My initial thought is $18,000. What do you guys think? I plan to clean it up this weekend and list it on marketplace. A few highlights below... 2015 Suburban LT...
  20. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    At full disclosure, my wife has a 2021 Toyota Sienna Hybrid and I have owned 2 other Toyota hybrid vehicles in the past. I love hypermiling in them. A lot of times I will use the same hypermiling techniques in the Suburban, and do not use cruise control. It is a bit of a job, but the MPG returns...
  21. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    Yes I have regularly seen 26-28 MPG on 50+ mile drives through rural 55 MPH state roads. Usually brings home 22 MPG at 70 MPH interstate travel.
  22. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    It is the standard gearing, I believe 3.08.
  23. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    Yes sir. I planned to make this a long process to hopefully bring in the right buyer. Having no lien on the vehicle allows me to wait this thing out without getting frustrated that I'm still making payments on it lol!
  24. L8T BURB

    2015 Yukon Denali - Engine Failure - Sell or Fix?

    After spending around 12k for an engine and transmission replacement in my 2015 Suburban last Fall... I have one word... REGRET!! It has been absolutely trouble free ever since but my goodness I am so far upside down on this thing it is absurd. Thankfully I have no lien on the vehicle, but when...
  25. L8T BURB

    6.6 Gas L8T Engine Swap in 2015 Suburban

    I am considering the thought of selling. Anybody interested in this thing? 193k miles as it sits. Daily driven. Clean, clear Kentucky title. Own one of the VERY few 6.6 swapped Suburbans! Only around 10k miles on the 6.6 L8T w/6L90 combo. This thing hauls! My mind isn't completely made up, but...

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