General Motors is already laying claim to best-in-class power for its new 6.2-liter V8 that will be offered in the 2014 Chevy Silverado and GMC Sierra this fall, and now it has released fuel economy numbers for the big engine. Available as an option on the Silverado LTZ and High Country (shown above) models as well as the Sierra SLT and Denali trims, the 6.2L EcoTec3 V8 will return 15 miles per gallon in the city and 21 mpg on the highway on rear-wheel-drive trucks; these numbers drop by one mpg each on four-wheel-drive models.

These estimates are in addition to the engine's 420 horsepower, 460 pound-feet of torque and max trailering capacity of 12,000 pounds, and considering all that power it's not terribly far away from the fuel economy of GM's equally new 4.3-liter V6 and its rating of 18 mpg city and 24 mpg highway. This announcement comes just days after a report indicated that GM is unable to keep up with the demand of the 5.3-liter V8 in the fullsize Chevy and GMC trucks due to supplier issues. GM's official press release for the 6.2-liter V8's fuel economy is posted below.
Show full PR text
It's Official: 2014 Silverado and Sierra Deliver Most Power

New Chevrolet, GMC light duty pickups also deliver best towing capacity in class and strong fuel economy

DETROIT – The 2014 Chevrolet Silverado 1500 and High Country and the GMC Sierra and Sierra Denali 1500, available this fall, with a 6.2L V-8 produces an SAE-certified 420 horsepower (at 5600 rpm) and 460 lb-ft of torque (at 4100 rpm), the most power of any pickup engine and torque of any light duty pickup truck engine.

The 6.2L V-8 available for Silverado LTZ and High Country and Sierra SLT and Denali models also delivers class-leading maximum available trailering capacity of 12,000 pounds when properly equipped.

Along with power, now comes strong fuel economy as EPA estimates for the 6.2L V-8 EcoTec3 engine technology enable 2WD Sierra and Silverado models to achieve 15 mpg city and 14 mpg city for 4WD. EPA highway estimates are 21 mpg for 2WD versions, and 20 mpg for 4WD models.

"Power and towing capacity are fundamental capabilities for full-size pickups," said Jeff Luke, General Motors Executive Chief Engineer for full- and mid-size trucks. "The 2014 Silverado and Sierra deliver unmatched power and towing capability with a host of ingenious driver aids."

The optional Max Trailering Package is available on 2WD and 4WD V-8 crew cab and double cab models and includes:

-Trailering package with seven-pin and four-pin connector
-Enhanced cooling
-Automatic locking rear differential
-Heavy-duty 9.75-inch rear axle with 3.73 ratio
-Increased-capacity rear leaf springs
-Revised shock tuning for increased control
-Integrated trailer brake controller.

In addition to the 6.2L V8, Silverado 1500 and Sierra 1500 will offer a 4.3L V-6 SAE-certified at 285 horsepower and 305 lb-ft of torque and a 5.3L V-8 certified at 355 horsepower and 383 lb-ft of torque.

Silverado and Sierra trucks equipped with the 4.3L V-6 will have available towing ratings of up to 7,600 pounds, the highest for any base V-6 in the segment. Silverado and Sierra trucks equipped with the 5.3L V-8 and the max towing package, available later this year, will have towing ratings of up to 11,500 pounds when properly equipped.

All three engines feature direct fuel injection, Active Fuel Management (cylinder deactivation) and continuously variable valve timing, a combination not found in competitor vehicles. The engines also use a compact overhead-valve design and weight-saving components such as aluminum blocks and cylinder heads to reduce mass for additional energy savings.

All three provide the proven power, torque and dependability of a large-displacement engine, seamlessly switching to four-cylinder mode to save fuel during light-load driving. The 5.3L V-8 has EPA-estimated fuel economy of up to 23 mpg highway (2WD models), the best of any V-8 pickup, and better than Ford EcoBoost V-6.

About Chevrolet

Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 140 countries and selling more than 4.5 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature spirited performance, expressive design and high quality. More information on Chevrolet models can be found at www.chevrolet.com.

About GMC
GMC has manufactured trucks since 1902. Innovation and engineering excellence is built into all GMC vehicles and the brand is evolving to offer more fuel-efficient trucksand crossovers, including the Terrain small SUV and Acadia crossover. The 2014 Sierra half-ton pickup boasts all-new powertrains and design, and the Sierra Heavy Duty pickups are the most capable and powerful trucks ever built by GMC. Every retail GMC model, including Yukon and Yukon XL full-size SUVs, is now available in Denali luxury trim. Details on all GMC models are available at http://www.gmc.com/, on Twitter at @thisisgmc or at http://www.facebook.com/gmc.


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    • 1 Second Ago
  • 90 Comments
      Luke
      • 1 Year Ago
      Those are some pretty impressive numbers. Be interesting to see what real-world is.
      • 1 Year Ago
      [blocked]
      Gordon Chen
      • 1 Year Ago
      "considering all that power it's not terribly far away from the fuel economy of GM's equally new 4.3-liter V6 and its rating of 18 mpg city and 24 mpg highway" I'm not sure what this means. There is a huge difference between 18/24 and 15/21. Just cuz its 3/3 doesn't mean its little. The smaller the mpg the more significant each mpg difference is. In this case it's 16.6%
      bookemd
      • 1 Year Ago
      With these trucks the number to look at is the city number, and I believe in 4wd form it goes 14, 16, 17...on their new trucks. I believe on the highway either v8 is capable of nearly the same thing going 60mph. But in the city if you push the 6.2 , it will push back on your wallet way more than the 5.3.
      linuxaddict7
      • 1 Year Ago
      Thats 2005 v6 mpg.
      Andrew
      • 1 Year Ago
      GM is the best ever, what does fords 6.2 get 10 mpg?
        neeko1118
        • 1 Year Ago
        @Andrew
        I have a Harley edition f150 with the 6.2. I've tried my hardest to get passed 11.9 mpgs and just cant. that's mostly hwy...
        Jeremy
        • 1 Year Ago
        @Andrew
        Chevy does seem to do rather well with larger displacement motors. Ford seems to do better with smaller motors. I would not say that Chevy or Ford is the best ever , each have their strengths and weakness . Like Luke said the 6.2 ford is and old motor they just slapped in there to use up until new design but the 5.0 and 3.5 TT are great motors.
        Dean Hammond
        • 1 Year Ago
        @Andrew
        Andrew....do some research and see % wise what the take rate on larger engines is.....in Fords defense the take rate is on the eco-boost engine which has the 6.2s ratings but delivers superior mileage....and it will be interesting to see what the take rate on Chevys 6.2 is...
          Dean Hammond
          • 1 Year Ago
          @Dean Hammond
          Chris, I dont rightfully know what Ford will do with the 6.2, in the 1/2 tons the eco-boost has made it redundant, and the take rate reflects that...theres no choices when it comes to the Superduties...so, they are going to have to do something, because Chevy has one upped the big bore game.......
      Seal Rchin
      • 1 Year Ago
      I believe those numbers, EPA is never wrong, it's not like they let us down before.
        The Wasp
        • 1 Year Ago
        @Seal Rchin
        EPA estimates are often inaccurate -- but they're far more realistic than the estimates used in many other countries, so be thankful for that.
          Seal Rchin
          • 1 Year Ago
          @The Wasp
          Thank god our EPA is more reliable than Uruguay's, especially since our government officials get paid so much less...................../s
        Andrew Ramos
        • 1 Year Ago
        @Seal Rchin
        EPA doesn't create the numbers. And GM, unlike BMW and Hyundai hasn't been found by the EPA to be cheating on fuel economy numbers.
      D Christin
      • 1 Year Ago
      How is it that gm gets about the same amount of power with 1.2 more liters then the ford 5.0?
        lasvegascolonel
        • 2 Months Ago
        @D Christin

        Actually, the GM does better than that.  The 5.3 gets better mileage on the highway than Ford's 3.5 Ecoboost....which is more boost than eco. 

        foamypirate
        • 1 Year Ago
        @D Christin
        Who cares about displacement? The GM 6.2L is more compact, lighter, more powerful, and makes just as much power, while being less complex.
        cfphelps
        • 1 Year Ago
        @D Christin
        How is it that Ford gets just about the same power as GM with 300% more camshafts?
        bookemd
        • 1 Year Ago
        @D Christin
        Well one, it's the truck block so it's calibrated for only so much horsepower and two it's a 2 valve not a 4 valve like Fords 5.0. Finally, GMs LT1 which this is related is rated for 460 HP in the Corvette.
        Rotation
        • 1 Year Ago
        @D Christin
        It's a pushrod motor, not overhead cam. Pushrod motors are smaller, lighter and less complex but they also turn fewer revs so their HP is lower by the same displacement. But no matter, displacement isn't actually a measure of engine size, it's of capacity. For example, GM's 6.2L LS7 (Z06) engine produced more power with less weight and size than BMW's 5.0L OHC engine (M5) of the same era.
          Papi L-Gee
          • 1 Year Ago
          @Rotation
          Wasn't the LS7 a 7.0L engine? (Not that that actually makes your point wrong... in fact, it supports it)
        the.fog
        • 1 Year Ago
        @D Christin
        This snazzy thing called a "computer".
        D Christin
        • 1 Year Ago
        @D Christin
        It's almost too easy to troll on here.
      truckguy
      • 1 Year Ago
      All FORDS SD are 12 plus years old, frames 50 plus old and people are complaining about the GM trucks are not all new?? underbody maybe 3 years old.
        montoym
        • 1 Year Ago
        @truckguy
        Funny how that works eh? A totally different looking body doesn't mean it's "all-new" Maybe just the shiny parts.
        Luke
        • 1 Year Ago
        @truckguy
        truckguy, where do you get your facts? The toilet store?
        • 1 Year Ago
        @truckguy
        [blocked]
      Nick B
      • 1 Year Ago
      God what a stupid name for the engine. I realize GM has been making "ecotec" motors for a while but I dont care. It just sounds so effeminate. Im still calling it a Gen VI small block.
        • 1 Year Ago
        @Nick B
        [blocked]
        A_Guy
        • 1 Year Ago
        @Nick B
        Stuff like that really matters to you, doesn't it?
        cfphelps
        • 1 Year Ago
        @Nick B
        It's Gen V. But I agree that I would have rather they retained the "Vortec" branding for the truck Gen V Smallblocks.
        Seal Rchin
        • 1 Year Ago
        @Nick B
        So eco is effeminate but SMALLblock is not. That's not what she said.
          Nick B
          • 1 Year Ago
          @Seal Rchin
          Small may not be appealing but at least you still carry the equipment ;)
        Joe
        • 1 Year Ago
        @Nick B
        I agree, stupid name. Who is that name appealing to?
          • 1 Year Ago
          @Joe
          [blocked]
        Rotation
        • 1 Year Ago
        @Nick B
        It's to compete with EcoBoost.
          montoym
          • 1 Year Ago
          @Rotation
          Except that GM's been using the EcoTec name long before Ford decided to change the TwinForce name to EcoBoost.
      Joe
      • 1 Year Ago
      Putting out only highway and city numbers without adding some sort of mixed driving rating seems like a disservice to consumers. I think that is especially true with trucks where you have to be much more careful with your driving to achieve the highway numbers.
        montoym
        • 1 Year Ago
        @Joe
        Well, an elementary math education will allow you to make a pretty solid guess at it. Basically halfway between the city and highway figures. In reality though, it's tilted slightly towards the hwy figure because they use a 45/55 city/hwy split to determine the combined figure.
          Rotation
          • 1 Year Ago
          @montoym
          Actually, it's 55% city and 45% highway, and it's split by distance not gallons so you have to use a harmonic mean.
          Joe
          • 1 Year Ago
          @montoym
          Yeah, math. We both know arithmetic skills and common sense are super common these days. Joking aside, a rough guess that is 1 mpg off on a truck can mean pretty significant money over the lifetime of the vehicle. More info is better right?
          montoym
          • 1 Year Ago
          @montoym
          @ Rotation: You are correct, my mind swapped them for some reason. I even 2nd guessed myself and still went with the wrong numbers. In any case, it's pretty close to an average but not quite.
      wafflesnfalafel
      • 1 Year Ago
      impressive - double the gas mileage and half again more power as a 454 from the 80's from the same drop of fuel. It's gonna sell like hotcakes. Love the engineering competition driving substantial, material improvements.
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