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FishOnOne's avatar
Nov 28, 2020

2021 Chevy Tahoe with 3.0 Diesel

Not a bad looking SUV with a diesel to boot. Estimated 28 hwy mpg. Probably a great SUV for someone who drives a lot of hwy miles and tows.

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  • colliehauler wrote:
    Carringb I wonder what percentage would be traded before 100k miles? I also wonder what it will do to resell when it approaches the 150K mile mark?

    I still have my old Excursion with the 7.3 Diesel and solo hwy it does about 17 mpg. I wonder if Ford will stick the small Diesel in the Expedition to match the GM offerings?


    I don't think Ford sees a future with these small diesels for the grocery getter market. They will most likely install their Power Boost hybrid which supposedly gets ~700 miles per tank in the F150.

    Not sure I'm sold on the hybrid design either, but we'll see.
  • Bionic Man wrote:


    You either have a REAL special vehicle, or your computer is way off and you would be better off hand calculating your mileage. Fuelly says


    The only thing special is him.....and there’s one in every crowd! Lol
  • It is an interesting engine. Seems like more electronic actuators than any other engine that comes to mind. A neighbor has Silverado with it and he tows a pontoon boat or TT with it never had a conversation about though. The EGR tap behind the DPF is clever be interesting to what the insides look like at 100k in terms of soot. Is it a Denso or Bosch fuel sys?
  • Carringb I wonder what percentage would be traded before 100k miles? I also wonder what it will do to resell when it approaches the 150K mile mark?

    I still have my old Excursion with the 7.3 Diesel and solo hwy it does about 17 mpg. I wonder if Ford will stick the small Diesel in the Expedition to match the GM offerings?
  • SweetLou wrote:
    So who makes their 3.0 diesel and also who's 10 speed transmission is this GM or someone else like Allison?


    The 3.0 was developed at the Turin R&D Center in Italy. This was one of the parts of Opel that GM kept when they sold off most of their European operations. The 10 speed is the same Ford-designed, GM-manufactured unit they started putting in the Camaro in 2017 and the Silverado in 2019. The variant used behind the 3.0L has a different torque converter from other installations, and includes a "centrifugal pendulum absorber" to dampen any vibration that you might otherwise feel at lower RPMs.

    https://web.archive.org/web/20180325045257/http://articles.sae.org/12015/

    https://media.chevrolet.com/media/us/en/chevrolet/news.detail.html/content/Pages/news/us/en/2019/jun/0603-silverado.html

    I think it's pretty cool from a power and efficiency standpoint. I have my reservations about the rear-mounted timing chain, and belt-driven oil pump. Both sound like Audi-levels of maintenance nightmares when they get old.
  • So who makes their 3.0 diesel and also who's 10 speed transmission is this GM or someone else like Allison?
  • Lwiddis wrote:
    I’m not impressed with the new Tahoe’s diesel mileage. My 2015 5.3L gas Tahoe did very well without the premium price.



    You either have a REAL special vehicle, or your computer is way off and you would be better off hand calculating your mileage. Fuelly says a 2015 Tahoe will average 15.9 MPG, tracked over 1,000,000 miles.






    I’m a fan of the 3.0 diesels. The main reason I didn’t even consider a Burb when I upgraded my Yukon XL last year was I didn’t want to be stuck with the 5.3. If the 3.0 diesel was available last year, I very well may have stayed with GM.
  • I have one of the last full size blazers with the 6.5 turbo diesels (1994) with around 300,000mi on it and when broke in it got 30mpg and today gets pretty near 27-28mpg. 27 with that little engine is not very impressive.
  • This looks like it will be a great SUV for GM. The biggest downside is the cost.

    We will be looking for a new SUV in the next year or two and the GM will be on the list. I'm not sure that the diesel option will be worth it, but I'll definitely consider it. It's pretty hard to beat the tried and true GM V8's! :C
  • I’m not impressed with the new Tahoe’s diesel mileage. My 2015 5.3L gas Tahoe did very well without the premium price.