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Chevy says not to look at the 2019 Silverado's fuel economy rating

The 2019 Chevy Silverado is hitting dealerships soon, and one of the most notable changes for the new full-size pickup is the addition of a 2.7-liter turbocharged inline-four. The engine replaces the naturally-aspirated 4.3-liter V6 in volume consumer models like the Silverado LT and promises more power, less weight and — most importantly — better fuel economy. The thing is, the gains in efficiency haven't been as dramatic as some might have hoped, especially when stacked up against competitors from Ford and Ram. As Automotive News reports, GM's response is a little murky. First, let's talk numbers. We're pulling all figures from FuelEconomy.gov, the official U.S. government source for fuel ratings. Fuel economy numbers on trucks vary greatly based on a number of factors. Bed and cab configuration play a part, but so does a four-wheel-drive system. You also have to factor in tires, transmissions, rear-axle gearing, hybrid systems and cylinder deactivation. Things like that can make the difference between best- and worst-in-class. The EPA's website doesn't give enough information a lot of the time, so there's really no easy way to compare apples-to-apples. First, take a look at the ratings for the 2019 Silverado. A 2.7-liter model with two-wheel drive is rated 20 city, 23 highway and 21 combined. That's both better and worse than a two-wheel drive 2018 Silverado with the 4.3-liter V6 (18 city, 24 highway and 20 combined). The updated 2019 Silverado with a 4.3-liter V6 has yet to be rated. With less weight and a smaller engine, many hoped Chevy would make bigger gains. It's unusual to see any decrease in a fuel economy metric these days. GM says that it's not done tuning the new 2.7-liter engine, so fuel economy could theoretically increase. Expanding further, a V8-powered 2019 Silverado (17 city, 24 highway and 19 combined) actually gets better highway fuel economy than a turbocharged four-cylinder powered truck in certain configurations, even if the latter has a better overall average. But that's only with two-wheel drive, the 8-speed transmission and cylinder deactivation. A Silverado with the 5.3-liter V8 and a 6-speed automatic is rated at 15 city, 22 highway and 17 combined. The biggest issue with the Silverado 2.7-liter doesn't come from within GM itself but from Ford and Ram. GM cites the Ford F-150 with the 3.3-liter V6 and the Ram 1500 with the 3.6-liter V6 as the closest competitors to its new 2.7-liter inline-four.

GM global sales off slightly this year

General Motors saw a slight dip in global sales through the first nine months of the year. In that time, the automaker moved 7.2 million vehicles – down 1.3 percent from 2014. For the third quarter alone, the numbers were down 3.1 percent with a worldwide volume of 2.3 million. The automaker had a better performance in North America, as Chevrolet is showing strength with some of its best crossover sales ever, and pickup trucks were up 16 percent for the year. Volume on the continent advanced 4.9 percent through September to nearly 2.7 million vehicles. The third quarter improved that figure even further with a 5.2-percent jump and deliveries of about 931,000. Elsewhere in the world, things were more mixed in the third quarter. European deliveries jumped 1.1 percent, but the company was still down 6.3 percent there for the year so far. Volume in China also fell 4.2 percent, but the country showed 1.6-percent growth through the first nine months. South America took the biggest, hit with Q3 numbers dropping 30.8 percent. While GM is seeing a small sales drop globally, the company could still climb up the ranking of the world's largest automakers by the end of the year. Volkswagen had the top spot in the first half of 2015, but since then, the German company has been rocked by an international emissions scandal. GM Sold 7.2 Million Vehicles in the First Nine Months of 2015 DETROIT – General Motors Co. (NYSE: GM) sold 7.2 million vehicles globally in the first nine months of 2015. The company posted sales increases in four of its five largest markets, with record sales in China and strong retail sales gains in the United States. Total sales were down 1 percent, due primarily to the company's previously announced decisions to strategically reduce its presence in certain markets, as well as difficult market conditions in South America. "Our unwavering focus on the customer is paying off in our largest and most important markets as we execute one successful launch after another in the right segments," said GM President Dan Ammann. "At the same time, we have reacted quickly to challenging macroeconomic environments in other markets and have shown the discipline to exit situations where we see no long-term path to acceptable returns." Examples of GM's recent success include: GM truck sales in North America were up 16 percent in the first nine months of 2015, driven by a 17 percent increase in Chevrolet truck deliveries in the United States.

Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video: