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GM's MPG overstatement could affect 2 million vehicles

Late last week, GM admitted that three of its large SUVs fuel economy window stickers did not match their actual efficiency ratings, and so the vehicles couldn't be sold. The stickers on the 2016 Chevy Traverse, GMC Acadia, and Buick Enclave said their ratings were one to two miles per gallon better than they should have been. Officially, the number of affected vehicles sits at about 60,000. But Consumer Reports makes a good point: what's up with all of the previous model year SUVs that are basically the same vehicle? To wit: the 2016 model year vehicles are not substantially different than the 2015 or the 2014, or even going all the way back to 2007. On the EPA's fuel economy website, all of these older models will "have better stated fuel economy numbers than the new vehicles in GM's dealerships," Consumer Reports noted. CR's best point, and the one that makes the 60,000 number potentially grow to 2 million if all of the vehicles built on this platform are affected, is that "[i]t seems unlikely that the company would change the powertrain on these carryover models so late in their model cycles in a way that would cause a dramatic, negative impact on fuel economy." GM says that earlier model year SUVs are not affected and the EPA did not respond to CR's question about the potential for more discrepancies. We've seen automakers reverse course before, so if GM has to come out with a mea culpa soon, don't be surprised. GM is rushing corrected stickers to dealers so that the SUVs can be sold again, but a fix for the already-sold vehicles could be trickier to solve. Related Video: Related Gallery 2013 GMC Acadia View 16 Photos News Source: Consumer Reports Government/Legal Green Buick Chevrolet GMC Fuel Efficiency mpg gmc acadia chevy traverse

Buick Avenir concept struts into Motown

We love auto show surprises, and Buick has already gifted us a sparkly package on the eve of the 2015 Detroit Auto Show. Dubbed Avenir, this four-door concept is said to signal the future of the Trishield brand by previewing a possible flagship sedan. Incorporating time-honored Buick design hallmarks like the sweep-spear profile, Ventiports, and even a subtle boattail rear-end, the four-place sedan is powered by a surprisingly real-world powertrain – namely a next-generation V6 with cylinder deactivation and stop/start, with the most interesting part of the driveline arguably being a "twin-clutch all-wheel-drive system" and a nine-speed automatic gearbox with paddle shifters. Make no mistake, this is a big car. At 204.5 inches long, it's longer than a standard-wheelbase Cadillac Escalade – a span that's emphasized by the car's long hood and waterfall grille – though it's not quite as wide. While clearly a showcar, the beautifully crafted interior looks largely produceable, including attributes like a next-generation 12-inch touchscreen infotainment system and 4G LTE wifi, but we suspect a production car would pick up a third rear seatbelt and give away some of its flowing contours that are said to have been "inspired by nature and sea waves receding on a beach." No word yet on whether there's actually a showroom future for a car like this – it could simply be an exercise designed to test the waters for a next-generation LaCrosse. After all, sedans aren't exactly popular concept fodder these days, especially as crossovers continue to eat into traditional sedan sales in many of the world's markets. However, China still loves the coddling rear seats of a proper four-door sedan (which in this case include silk and bamboo elements), and with a majority of Buick sales happening in the People's Republic, the Asian nation controls the destiny of this General Motors brand. Said another way? Anything is possible, especially with General Motors known to be working on a large flagship sedan for Cadillac already – the Avenir is reportedly based on the same Omega architecture that will underpin the forthcoming CT6. What do you think? Is this a promising direction for the resurgent Buick? Scroll through our gallery, check out the video, and then have your say in Comments.

2018 Buick Regal Sportback First Drive Review | Eyes wide shut

AUSTIN, Texas—Barreling along the tight backroads of Austin's Hill Country, my driving partner was coming in a little hot. Usually, beads of sweat would have appeared by now, hand crushing the grab handle. On roads such as this one, which are barely a car and a half wide, unusual confidence in the car is essential. But even with eyes closed (from the passenger's seat), it felt as if I was riding in an Audi, not in a product that shares its roots with the Chevrolet Malibu. This is a very good thing for Buick. It's unusually planted and stable, almost Germanic in nature. There's no traditional sedan available on these shores, which begs the question: Did the new Regal have to be a hatchback? Nope. Buick sells a traditional four-door Regal in China. The Regal Sportback, which is built in Russelsheim, Germany, is a European take on the sedan, in the vein of the recent proliferation of four-door "coupes" from all sorts of car manufacturers. It's far more versatile than most stylized sedans, however, with a wide opening that can swallow a full-size bicycle with both wheels on. Really—we tried it. There is an alternative to the hatchback, although it won't please sedan purists: the Regal TourX, a wagon in all but name. The 310-hp Regal GS isn't far away, either, and a luxe Regal Avenir is likely to appear. A hybridized Regal eAssist is also a possibility. Alas, the Regal nameplate is unlikely to reappear on a two-door coupe, according to a Buick spokesperson. The closest analogy for the Regal Sportback is the recently departed Volkswagen CC, in both form and function. From the quarter angles, the Regal Sportback has hints of the last-generation BMW 5 Series. Dead on from the front, or in your rearview mirror, there is more than a hint of the Audi shield grille. The LED headlight signature is distinctly European in style, but vaguely defined. Dynamically, the front-wheel-drive Regal Sportback is a match for the Audi A4/A5 Sportback duo. The smooth, turbocharged 2.0-liter inline four is a formidable powerplant, particularly when paired with the nine-speed automatic transmission. Its 250-horsepower output is a close match for Audi's engine of the same displacement. All-wheel drive is offered on the top two trim levels, Preferred II and Essence, as an option, paired with an eight-speed automatic. A trick differential that can direct torque to individual wheels, in addition to splitting it front and rear, is standard on the AWD models.