2021 Chevy Tahoe Diesel Fuel Economy Ratings Announced
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The 2021 Chevy Tahoe introduces an all-new fifth generation for the SUV nameplate, with a ground-up overhaul that includes fresh exterior styling, a revamped cabin space, and a new underlying platform, not to mention the option for a new turbo-diesel engine. Now, the EPA has revealed the official fuel economy ratings for 2WD Chevy Tahoe diesel models.
According to the EPA, the 2021 Chevy Tahoe diesel posts 21 mpg in the city, 28 mpg on the highway, and 24 mpg combined, with an estimated annual fuel cost of $1,500.
| Engine | 5.3L V8 L84 | 6.2L V8 L87 | 3.0L I6 LM2 |
|---|---|---|---|
| Fuel Type | Regular | Premium | Diesel |
| City | 16 | 15 | 21 |
| Highway | 20 | 20 | 28 |
| Combined | 18 | 17 | 24 |
| Estimated Annual Fuel Cost | $1,750 | $2,450 | $1,500 |
By comparison, 2021 Chevy Tahoe models with 2WD and the naturally aspirated 5.3L L84 V8 gas engine post 16 mpg in the city, 20 mpg on the highway, and 18 mpg combined, with an estimated annual fuel cost of $1,750. New Tahoe models with 2WD and the naturally aspirated 6.2L L87 V8 post fuel returns of 15 mpg in the city, 20 mpg on the highway, and 17 mpg combined, with an estimated annual fuel cost of $2,450.
Clearly, the new 2021 Chevy Tahoe diesel is the most economical choice of the three engines offered, per the new EPA figures.
As a reminder, the diesel engine in question is the Duramax turbo-diesel 3.0L LM2 I-6 LM2, which features dual overhead cams and direct injection. Output is rated at 277 horsepower at 3,750 rpm and 460 pound-feet of torque at 1,500 rpm.
All three engine options utilize the GM Hydra-Matic 10L80 10-speed automatic transmission and a 3.23 final drive ratio.
As GM Authority exclusively covered back in July, the 2021 Chevy Tahoe diesel is available to order as of this month. The LM2 diesel engine is available on every trim level with the exception of the off-road-oriented Z71 trim, as the Z71’s unique fascia obstructs the diesel engine’s intercooler piping.
We’ll have more info on GM’s latest diesel-powered SUVs posted very soon, so stay tuned. In the meantime, subscribe to GM Authority for more Chevrolet Tahoe news, Chevrolet news, and around-the-clock GM news coverage.
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lol i spend $350-400 a month on fuel with my 5.3. By their numbers they estimate someone is driving around 10,000 miles annually, suuuuure that’s realistic :rolls eyes:
in any case that’s good numbers for the diesel, i wonder what it’s acceleration is unburdened and with something like an average 3000lb trailer plus cargo
A few points. First the availability of diesel on all but the Z71 trim is good since GM historically has made buyers go up one or two trim levels. Second point is what mileage is used as well as cost per gallon of diesel fuel to arrive at $250 cost differential as well as the cost for the diesel to the 5.3L. A better break even could be determined if those figures were provided. Lastly tow ratings as well as rear axle ratio would be helpful plus most buyers are 4X4 other than Texas so do that analysis to paint a better picture.
I wouldn’t question the diesel’s unladen accel with that amount of torque. What I find questionable is the big difference in annual fuel cost between the 5.3 and the 6.0 …….also, something to consider is the cost of the diesel option
The fuel cost difference between the 6.2 and 5.3 is due to premium fuel in the former. For the numbers reported by fuel economy.gov, they assume diesel costs 2.38, regular costs 2.10, and premium costs 2.77. They assume 15k annual miles and 55% of driving in city.
Diesel is 60-80 cents higher than regular where I live. So the actual nbers will vary widely based on location.
Cost to order the diesel ?and what trim level do I have to go to get it ? Mine would be a base ls 4×4 bench seat 3rd row delete max tow but gm will force buyers to the Highest trims “every one wants them that way ” so add the cost of the diesel and going the Lt or permeire trim how many miles before one see savings ?
Everything you asked is available either on this site or at chevy site.
Also, 2021 suburban diesel 2wd numbers are 23 combined, 21 city, 27 highway.
Am I crazy to think the actuals will be far better in real life?
Yes, look at fuelly reports for silverados with the 3.0: fuelly average is 23 with a peak at 25. EPA combined rating is 25 for 2020 or 24 for 2021.
Not bad for such a large vehicle
My 2010 Cobalt isn’t great in the City but on the Hwy I consistently get the EPA rating of 5.9 litres/100 km. Give or take.
I can get it down to 5.5 litres/100 km going South downhill w cruise control at the speed limit
With or without Air conditioning
Wow.!!. This is unbelievable .! I am shocked .!.! Yes .! My dream car I need this truck I can’t wait to buy it when I am able to .! I knew Chevy could do it .!.
My 2020 Silverado High Country crew cab 4 WD gets 26 when driven 58 MPH – around town stop & go around 30
MPH average is 20.5
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I wouldn’t be surprised if the new diesel powered versions of the Suburban and Tahoe get better real world fuel economy figures than what the EPA says on paper. Still very impressive efficiency figures though.
I agree; this is impressive
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Diesel Cost , Still not on the Chevrolet web site ? We need to know the price and trim levels
My 2001 Tahoe with a 5.3 l gasoline engine gets 17 mpg combined but mostly highway.
But our speed limit is 70 mph and elevation from 4,000 to 9,000 feet.
Interesting that in 19 years they have made a 1mpg improvement.
Is it true diesel will only be 2wd and not 4x 4?
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TFL trucks tested the diesel Silverado at 32mpg highway. I’d hope the Tahoe is at least as aerodynamic as the Silverado. imo, this would be great in a mid-sized/large sedan/fastback.
The only bummer about the diesel is DPF, DEF fluid, and EGR.
The thing would get 40 mpg without all the fake emissions crap on it.
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