1947 Buick Roadmaster on 2040-cars

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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

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. 

Junkyard Gem: 1978 Buick Skylark Sedan

Around the time that OPEC shut off the oil taps, The General realized that it was time to sell more small cars from GM divisions not previously known for such machines. The logical candidate for this project was the Chevrolet Nova, a rear-wheel-drive compact that shared much of its chassis design with the Chevrolet Camaro and Pontiac Firebird. The Nova-based Pontiac Ventura came out in the 1971 model year, and the Buick and Oldsmobile Divisions began producing their own badge-engineered Nova siblings for 1973 (Cadillac was late to the party, but eventually created the Nova-based Seville for 1976). At first, the Buickized Nova got Apollo badges, but the better-known Skylark name was applied to these cars for the 1975 through 1979 model years. Today's Junkyard Gem is one of those Nova-based Skylarks, found in a Denver self-serve yard. From the 1964 through 1972 model years, the Skylark lived on the A-Body chassis and was sibling to the Chevrolet Chevelle/Malibu, Pontiac LeMans/Tempest/GTO, and Oldsmobile Cutlass/442. After the 1975-1979 rear-wheel-drive X-Body phase, the Skylark name then went onto the unrelated front-wheel-dive X-Body chassis developed for the Chevrolet Citation. It's a Nova, sure, but Buick made sure that it had a bit more swank than its Chevy counterpart. Checked seat fabric with big square buttons! The base engine in the '78 Skylark was the 3.8-liter Buick V6, rated at 110 horsepower. GM had invested in a new crankshaft design for this engine the year before, so it no longer had the "odd-fire" cut-down V8 crankshaft that shook the fillings out of so many drivers' teeth in earlier years. An assortment of low-compression V8s from Oldsmobile, Chevrolet, Pontiac, and Buick were available as optional equipment as well, eventually leading to the "Chevymobile" lawsuits of a few years later. The base transmission in this car was a three-speed manual (I'm not sure if you could still get a three-on-the-tree column-shift manual Skylark in 1978, but a three-on-the-floor manual was available for sure). The very last three-on-the-tree car Americans could buy was the '79 Nova and its Olds Omega/Pontiac Phoenix siblings, while the final three-on-the-floor cars were the '81 Malibu and siblings. This car has the optional three-speed automatic.