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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.

GM says hybrid Corvette no laughing matter [w/poll]

When Mark Reuss was in LA recently, he sat down to have a few words with the scribes at the Los Angeles Times. When the issue of a hybrid Corvette came up, Reuss answered with "Don't laugh." The General Motors president is a complete fan of the possibility, calling it "attractive" and "really fun," believing it would improve GM expertise and that "people would love it."
Naturally, the president being supportive of an idea doesn't give indication that a hybrid Corvette is on the way. However, with supercars like the Porsche 918 Spyder and Ferrari LaFerrari giving hybrid tech a solid, if remote, place in the performance car world, the inexorable trickle-down of technology means we shouldn't be surprised if and when it does happen.
And now that we have that non-negative half-answer to a speculative question, it would be irresponsible for us not to commence rumormilling for the C8 Corvette. Taking Reuss at his word, the C8 will obviously be a hybrid with all-wheel-drive - the left side wheels driven with electric motors, the right side with the mid-mounted, four-cylinder diesel engine. With coefficient of drag of just .16, figure on a 0-to-60 mile-per-hour time of under 2 seconds and an all-electric range of something like 30 miles at top speed. Don't forget, folks, you read it here first.

Huge, pricey trucks haul jobs and profits for the Detroit Three

DECATUR, Texas — Mickey McMaster is on his 12th pickup truck. The 61-year old farm equipment dealer in Decatur, Texas, two weeks ago treated himself to a 2019 GMC Denali for around $69,000 — a reward for long hours at work. "For me this is the Cadillac of trucks, it's a real luxury vehicle," McMaster said. "I've worked my way up to afford a truck like this and it shows that I've earned it." McMaster is the kind of customer General Motors Co is banking on as it plans to add 1,000 jobs at a plant in Flint, Michigan that will build a new generation of its largest pickups. Demand from Texas and other heartland states for big pick-ups is providing a lifeline to many workers the No. 1 U.S. automaker is laying off at plants elsewhere. The Detroit Three automakers and thousands of their U.S. workers are counting on customers like McMaster to keep buying bigger and more luxurious pickup trucks even if overall U.S. vehicle demand weakens this year, as most analysts predict. At Flint, GM will build a new generation of its heavy-duty Chevrolet Silverado and GMC Sierras, including luxury models that are some of the most profitable vehicles on the planet. GM, Ford Motor Co and Fiat Chrysler Automobiles NV's Ram division own the segment and are each doubling down with new or redesigned models launching this year. Sales of heavy-duty pickups in the United States have grown to more than 600,000 vehicles a year, up more than 20 percent since 2013, according to industry data. Prices for luxury models can easily top $70,000. GM on Tuesday celebrated the launch of a new generation of heavy-duty GMC and Chevrolet pickups at the assembly plant in Flint, Michigan, that is now building all such trucks for the company. At the same time that GM is laying off thousands of U.S. workers and planning to shutter five North American factories, Flint is hiring. The plant runs on three daily shifts, six days a week. As the new model's assembly system ramps up, the plant's capacity will increase by more than 25 percent, plant manager Mike Perez told Reuters. The Flint plant plans to add 1,000 workers, more than half of the 1,500 factory workers who have asked to transfer from plants GM has targeted for shutdown as part of CEO Mary Barra's restructuring plan. "We're bringing in 50 to 100 people every week," said Perez. Workers last week were still finishing the job of retooling the Flint factory to build the new heavy-duty trucks as part of a $1.5 billion investment project.