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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.

Chevy Corvette gets Valet Mode with Performance Data Recorder [w/video]

For the 2015-model-year, Chevrolet introduces Valet Mode for the Corvette, an enhancement to the Performance Data Recorder (PDR) already available and to your peace of mind. The PDR already captures 720p HD video with a windshield-mounted camera, records interior audio with a cabin microphone and gathers telemetry data using GPS, saving the data to an SD card in the glovebox. You can then watch your track-day antics with various information overlays on the center console screen.
Valet Mode will let you hit 'Replay' when your car gets pulled up front smelling vaguely of fricasseed clutch. Turned on by entering a four-digit code, it also locks the interior storage spaces and turns off the infotainment system. It can't be turned off until the code is re-entered. There's a press release below with more information as well as a video that explains how it works, with the obligatory dig at the 'Vette's biggest foe.

Recharge Wrap-up: Renault Zoe recall, Proterra buses log 2M miles

Renault is recalling 10,649 examples of its Zoe electric car for potential brake hose failure. Cars built at the company's Flins factory between the Zoe's 2012 introduction and October 6, 2014 - a quarter of all Zoes ever built - are subject to the recall, though no accidents have been reported from rupturing brake lines. Recalled vehicles will have the brake hose positions inspected and, if need be, fixed. Read more from Reuters. Proposed legislation in Massachusetts would make the state even more EV friendly. While the state already encourages EV adoption with a $2,500 rebate incentive, the new bill would give battery electric vehicle drivers HOV lane access. Additionally it would set up a standard building code for EV chargers, and allow EV-only parking spaces. "With decreased gas prices, a 10 percent increase in vehicle miles traveled over the last 20 years, and a carpool rate below the national average, we must address personal vehicle use directly as part of our transportation emissions reduction strategy," says Rep. Frank Smizik. Read more from Teslarati. The New York Daily News has named the 2016 Chevrolet Volt as its "Green Machine of the Year." Seamless operation, peppiness, and a nice suite of equipment make it a top choice for the publication. "The 2016 Chevrolet Volt is all new, inside and out, and takes the plug-in hybrid segment to another level, thanks to its increased EV range, updated cabin, and more efficient gas-powered engine," writes Daily News Autos writer (and all-around good guy) Nick Kurczewski. Honorable mentions go to the Tesla Model S, BMW i3, Toyota Prius, and the hydrogen-powered Toyota Mirai. Read more from the Daily News, or at Clean Technica. Proterra electric buses have accumulated 2 million miles of revenue service. That equals 3,800 tons of carbon emissions that have been prevented and 420,000 gallons of fuel unburned. Proterra says it has 63 buses in service in 15 cities, and that it is ramping up production to meet growing demand. "This latest milestone exemplifies the economic, environmental and civic value of electric mass transit," says Proterra CEO Ryan Popple, "and demonstrates to the transit agencies that diesel - often viewed as a necessary evil - is no longer necessary." Read more at Inside EVs. Evercar, a unique EV carsharing service, has found success in Los Angeles. Evercar bills itself as carsharing for rideshare and delivery drivers.