2007 Gmc Yukon Denali Sport Utility 4-door 6.2l on 2040-cars

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GM 6.2L EcoTec V8 rated at 21 mpg by the EPA

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 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.

2016 GMC Terrain Denali Quick Spin

Here's a bewildering statistic – General Motors sold over 347,000 GMC Terrain and Chevrolet Equinox crossovers in 2014, making the Theta platform twins the best selling vehicles in their segment. GM sold more Equinox/Terrain crossovers than Honda did CR-Vs, Ford did Escapes, and Toyota did RAV4s. After a week behind the wheel of the 2016 Terrain Denali, we can't fathom why GMC's entry, which accounts for nearly a full third of GM's annual small CUV sales, has been so popular. An inefficient engine, cheap interior plastics, uncomfortable seats, a shortage of technology, and a high price left us questioning why anyone would order this Denali over a Titanium-trim Ford Escape, a Jeep Cherokee Limited, or a Hyundai Santa Fe Sport with the Unlimited Package. Driving Notes While looks are subjective, we'd posit that GMC didn't go far enough with its 2016 mid-cycle refresh. New accents on the front bumper, a tweaked grille surround, and LED running lights round out the changes up front, while the rear gets a slightly different bumper. GMC claims there's a new hood, although we challenge you to pick out the differences – here are the official galleries for the 2013 and 2016, if you'd like to try. GMC missed a tremendous opportunity here. New headlights, some restyled taillights, and tweaked mirrors would have given the impression of a more significant refresh. As it stands, these changes don't add up to much. GMC also claims it made changes in the cabin, adding a "revised instrument panel center stack." Aside from the missing CD slot, which has been replaced with an oddly shaped and not terribly useful shelf, it's hard to spot much of a difference. The Terrain Denali's cabin materials feel cheap. You'll be spending at least $35,000 to park one of these in your driveway, but aside from the leather-and-faux-wood steering wheel, no material feels worthy of that price tag inside. The lower dash plastics are hard and scratchy, the center stack feels hollow and creaks when pressed on, and the too-small shade over the seven-inch display feels flimsy. The upper dash is covered in a cheap-feeling, leather-like material that looks unchanged from when the Terrain Denali debuted back in model year 2013. These materials don't make sense in a vehicle that, as tested, exceeded $41,000. The most egregious thing about the refreshed Terrain is the lack of content.

2018 GMC Acadia with 'Christmas Aero' modification gets in the wind tunnel

Tis the season of "Big" - big cheer, big parties, big bowls of eggnog, big decorations, and when it comes to your family hauler, big drag. Festive drivers who festoon their crossovers, minivans, and SUVs with wreaths, Rudolph noses, fuzzy antlers, and rooftop Christmas trees undo the years of work that car engineers devote to fractional gains in fuel economy. To put numbers to such fuel-guzzling madness, GMC started with a 2018 Acadia, optioned it with the Xmas Aero Package - both Standard and Plus versions - put it in Lockheed-Martin's wind tunnel. The resulting dip in fuel economy results probably won't surprise anyone who's used a roof rack - or, for that matter, their car's air conditioning. However, it might surprise you to find out which seemingly substantial decoration had no effect, and which seemingly innocuous decoration was about twice as bad as running the A/C on its Mr. Freeze setting. Check out the brief video above for the results. And consider placement of that bow carefully.