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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 reveals new Verano in Shanghai

The lion's share of the new vehicles being showcased at the Shanghai Motor Show this week may never make their way to US showrooms. But Americans will surely want to note the unveiling of the all-new Buick Verano. The current compact sedan in the Buick lineup arrived in 2011, and is now preparing to enter its second generation with the model you see here. Details are the only element more scarce than photos (GM has released one thus far), but we can see that the new Verano adopts more dynamic styling than the model it replaces. The design borrows elements from the Riviera and Avenir concepts, with a more steeply raked windshield and rear glass said to give the new Verano a more elongated look (and lower drag coefficient) than its compact footprint would dictate. Up front you'll see Buick's signature waterfall grille, flanked by HID xenon headlights with LED daytime running lights and taillamps. Motivation comes courtesy of a 1.5-liter turbocharged Ecotec four, driving 166 horsepower and 184 pound-feet of torque through a new seven-speed dual-clutch transmission. The 17-inch wheels are shod with Continental rubber. Just how many of these specifications will remain relevant when the new Verano reaches Buick dealers on this side of the Pacific remains to be seen, but for now you can delve into the full press release below. Related Video: Buick Verano Debuts at Shanghai GM Gala Night New-generation sports sedan offers stylish exterior, class-leading fuel efficiency and precise handling SHANGHAI – Buick's new-generation sports sedan, the Verano, made its debut this evening at Shanghai GM Gala Night. It will be appearing on Shanghai GM's stand at Auto Shanghai 2015, which starts tomorrow. The brand's latest entry in the mid-range passenger car segment has a stylish exterior, class-leading fuel efficiency and precise handling. The Verano is targeted at individuals who value a personal and dynamic driving experience. Design inspired by Buick Riviera and Avenir concept cars The Verano was inspired by the new Buick Riviera concept car, which premiered in 2013, and captures the design essence of the Buick Avenir concept car, which debuted at this year's North American International Auto Show in Detroit. It represents an innovative interpretation of Buick's classic styling while exemplifying the elegance and dynamism of Buick's new-generation products.

Last-ever Buick Grand National heads to Barrett-Jackson auction

This 1987 Buick Grand National brought the curtains down on a heap of General Motors history. When this black beauty rolled down the line at 5 p.m. on December 11, 1987, it represented the end of manufacturing at GM's Pontiac Assembly Plant after 60 years building cars. This was the last car to sit on GM's G-Body platform, having supported legendary names like Monte Carlo, Cutlass Supreme, and Regal. And this was the last-ever Buick Grand National, a big coupe that in just five years on the market had helped make the Buick Regal lineup an object of sincere lust among enthusiasts. Powered by a 3.8-liter turbocharged and intercooled 3.8-liter V6, the engine made 245 horsepower and 355 pound-feet of torque. The only car above it in the lineup was the exceptionally rare GNX, which made 276 hp and 360 lb-ft. The Buick Grand National is headed to the Barrett-Jackson auction block in Scottsdale next month.    Louisiana resident Bob Colvin bought this car from the factory. The Drive spoke to Colvin, who explained that then-GM President Roger Smith told him he could have the penultimate Grand National, but Buick planned to put the last car on display. When Colvin arrived at the plant, though, Colvin said the plant manager told him, "I'm running this plant and you've gone through the effort to be here. It will be a real celebration," and got him the last car made. As proof, a GM film crew followed the car down the line, plant workers and two GM execs signed various parts of the engine, including current GM President Mark Reuss. The car comes with all of the autographs and signage the autoworkers created to go with the car, as well as the original window sticker. Colvin and his wife built an addition onto their house to display the car. Save for a trip to the Buick Centennial Celebration in 2003, the Buick has lived in its special place all its life and has just 33 miles on the odometer. Behind the new-car plastic that shrouds the interior, the only flaw appears to be a tiny crack in the steering wheel center cap where a bolt might have been overtorqued. The car is being offered with no reserve, the pre-sale estimate landing right around the $500,000 mark. That would about double recent auction sales for low-mileage GNX's this year, but there's every reason to believe this car's one-of-one place in history could get auction paddles waving.