2007 Gmc Yukon on 2040-cars

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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.

GM updating fullsize pickups for 2015

As Ford prepares to hit the market with its x-factor, aluminum-intensive F-150 and Ram sales stand tall enough to meet General Motors truck sales eye-to-eye, GM is putting the word out that it's going to add more features to its trucks and do so more regularly. An executive engineer for pickups told reporters that "a whole array" of changes are on the way as soon as the 2015 model year and then would likely come "the year after that, the year after that, the year after that."
Only GM knows the way it plans to go with its fullsize trucks, with almost everyone else - including its dealers - griping about market share at the same time as they applaud profits and hope for clarity and growth. GM raised prices on the Chevrolet Silverado and GMC Sierra not long after launch even as it was losing market share and getting called "the least successful large pickup launch over the last 15 years," further upsetting dealers, then Ram outsold the Silverado in March of this year and led GM to increase incentives. But transaction prices rose with the premium; in the first quarter of this year more than 37 percent of the trucks costing more than $40,000 were the Silverado and Sierra, leading one dealer to say of the Sierra, "You can't sell a cheap one," and the analyst who made that "least successful launch" comment to opine, "GM may have made the right call to go for price over share."
We won't know for a few months what any of these updates will be, but the rumored changes for the Silverado and Sierra appear to cover all the bases, including appearance, capability and fuel economy. Rumors run to higher gear counts, stop-start technology and diesel engines before brand-new pickups come for the 2019 model year, those next-generation models supposedly to be engineered with a lot more aluminum.

2015 Chevy Tahoe, Suburban and GMC Yukon unveiled

General Motors has today unveiled its new family of fullsize SUVs, including the 2015 Chevy Tahoe, its longer Suburban sibling, and their GMC Yukon, Yukon XL and Yukon Denali cousins. More efficient powertrains, improved aerodynamics, increased connectivity and better overall refinement are what Chevy and GMC say will separate their new SUVs from the current generation.
Sporting a tried-and-true body-on-frame architecture, these full-size SUVs feature platforms that are stronger and offer a wider rear track for "a more planted stance," according to Chevy and GMC. Mounted at the front of each SUV is an EcoTec3 powertrain, which consists of a standard 355-horsepower, 5.3-liter V8 (or a 420-hp, 6.2-liter V8 for the GMC Yukon Denali alone) with direct injection, cylinder deactivation and continuously variable valve timing, that's paired with a Hydra-Matic 6L80 six-speed automatic transmission. The setup is said to be more efficient than before, though official EPA fuel economies for each vehicle are not yet available. To help the powertrain achieve the best possible fuel economy in these 5,000+ pound SUVs, the new styling was developed with aerodynamics in mind. For the same reason, electric power steering also makes its debut in the Tahoe/Suburban/Yukon family.
The front fascias of the Chevy Suburban/Tahoe and GMC Yukon are distinct, but from the base of the A-pillars back, they share most of the same styling cues. This now includes inlaid doors that tuck into the door sills, instead of over them, which improves aerodynamics and fuel economy, and lessens interior noise. The hoods and liftgate panels now are made of aluminum in an effort to reduce vehicle weight. Chevy and GMC also tout that the Tahoe/Suburban and Yukon don't share a single piece of sheetmetal or lighting element with the brands' full-size pick-up trucks.