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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

New Forza Horizon 2 pack features Chevy Monte Carlo SS, Audi RS6 Avant [w/video]

The latest car pack for Forza Horizon 2 is hitting Xbox Live today, giving Xbox One owners a shot at six new vehicles that date back to 1970. Leading the charge in the hearts and minds of the Autoblog staff is, of course, the 1988 Chevrolet Monte Carlo SS, one of the most 80s-tastic performance coupes of its time. Chevy's 80s-era NASCAR representative is joined by another General Motors performance two-door, in the form of the 1970 Buick GSX. Complete with a 455-cubic-inch V8, the GSX could best be thought of as the grandpappy to the iconic GNX of the late 1980s. Crossing the pond, we have a trio of offerings from the United Kingdom, with the 2002 Lotus Esprit V8, the redesigned, aluminum-intensive 2014 Land Rover Range Rover Supercharged and finally, the 2015 McLaren 650S. The mid-engined offerings should be a riot on the winding roads of Forza Horizon 2's European locales, while the Range Rover should make cross-country efforts an absolute breeze. Finally, virtual wagon lovers will be able to enjoy the 2015 Audi RS6 Avant and its combination of Quattro all-wheel drive and a twin-turbocharged V8. As per usual, this latest car pack will be available to gamers for $5 while season pass owners will score the sextet of vehicles for free. Scroll down for a video of the new offerings in action, as well as the official press release from Turn 10 Studios. "Forza Horizon 2" NAPA® Chassis Car Pack Now Available The roads and countryside of "Forza Horizon 2" beg for you to leave your mark on them. The NAPA® Chassis Car Pack for "Forza Horizon 2" on Xbox One has arrived, bringing five amazing new cars to blaze trails, break records, or just enjoy a casual cruise in. First off, the new McLaren 650S Coupe's uncanny acceleration and preposterous top speed will satisfy the elitist in you. If you want get away from it all, there's no better way than in the Supercharged Land Rover. Need muscle? Take the classic form of the Buick GSX or the later model Monte Carlo SS for a spin. We all need more wagon in our lives and the Audi RS6 is ready to run around town or serve up surprises at the track. The NAPA® Chassis Car Pack for "Forza Horizon 2" on Xbox One is available today for $5 in the Xbox Live store. Starting today, also available this month for free for all Xbox One players is the 2002 Lotus Esprit V8.

GM marks 500 million vehicles

General Motors is marking a major global milestone, as 500 million vehicles have rolled off its assembly lines since the company's founding in 1908. To mark the occasion, the automaker is continuing to invest in production and offering a one-time discount to some customers. GM North America boss Alan Batey used the festivities to announce the Fairfax Assembly factory in Kansas as one of the sites earmarked for the company's $5.4 billion in upcoming investments. The plant will get $174 million of that money for new equipment and technology to build the 2016 Chevrolet Malibu. Among the upgrades will be a shake-and-rattle booth that will simulate road conditions to find squeaks. To commemorate both the production milestone and the Fairfax plant, Batey and company CEO Mary Barra also gave away a 2016 Malibu to a wounded Iraqi war veteran, and the two execs announced that in the third week in May all GM employees can share a one-time customer appreciation discount with friends to help get them into the automaker's products. Barra also gave a speech to the workers there about some of the other milestone's in the company's history, which you can read below. Innovation on the Line: GM Manufacturing Milestones Many of General Motors' most important innovations have occurred behind the scenes, in its manufacturing facilities. Concepts such as changeover, flexible assembly, automation, computer simulation, machine vision and robotics were developed at GM. Over the decades these innovations have helped enable improvements in vehicle quality, efficiency and competitiveness. 1901: Ransom Olds' famous Curved Dash Oldsmobile, designed with simplicity, reliability and value in mind, was the first American car built in a factory designed specifically for automobiles and in standardized volume production. GM acquired Oldsmobile in 1908. 1908: Cadillac wins the Dewar Trophy, Europe's most prestigious award for precision and excellence in manufacturing, by demonstrating the auto industry's highest standards for precision and interchangeability of parts by disassembling three Cadillacs and mixing the parts randomly before reassembling and driving them before a contingent of judges. 1922: GM hires William Knudsen to lead Chevrolet's turnaround. Knudsen implements flexible mass production, which helps Chevrolet incorporate annual styling changes and take market share from Ford.