1967 - Chevrolet Camaro on 2040-cars

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GM diesel pickups first to undergo extra EPA, CARB testing

The effects of Volkswagen's long-running diesel emissions evasion are starting to spill over to other automakers, but General Motors is taking things in stride. The 2.8-liter, four-cylinder Duramax in the 2016 Chevrolet Colorado and GMC Canyon is the first engine to get extra scrutiny by the Environmental Protection Agency and the California Air Resources Board, Automotive News reports. Rather than just the usual in-lab test, it's also being checked on the road. However, the extra evaluation shouldn't have any impact on when the trucks with his mill hit dealers later this fall. "We're in our final stages of the EPA certification, and our launch is on track," Chevy spokesperson Otie McKinley tells Autoblog. The four-cylinder diesel in the trucks makes 181 horsepower and 369 pound-feet of torque, and the automaker is touting low NOx production. In the announcement for the Colorado's specs, the company calls it "the cleanest diesel truck engine ever produced by General Motors." The tech includes exhaust gas recirculation to lower combustion temperatures and improve emissions. There's also a urea tank like on the bigger diesels for full-size trucks, and it gets refilled in time with oil changes. An indication on the instrument panel lets drivers know when that's needed, too. Even with the more demanding testing, the company doesn't seem too worried about the four-cylinder passing. "Part of our development process is on-road and off-road [laboratory] testing," Scott Yackley, Chevy Trucks assistant chief engineer, said to Automotive News. In the wake of the VW scandal, the EPA has pledged more rigorous testing. Before, on-road emissions evaluations were largely limited to heavy-duty vehicles, but the agency has decided to apply the checks more often to other models. There's also now greater cooperation with Canadian authorities.

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.

2016 Chevrolet Camaro powers up, slims down

Don't be fooled by its familiar appearance, the 2016 Chevrolet Camaro is vastly different than its iconic predecessors. It has a new chassis, a fresh engine lineup, and is loaded with clever technologies that promise to invigorate and improve the sixth generation of Chevy's legendary sports car. It was revealed Saturday before a crowd of enthusiastic Camaro revelers on Belle Isle in Detroit. Redesigning the sports coupe was a heady task, especially as its archrivals, the Ford Mustang and Dodge Challenger, drive better and are more powerful than ever. But the new Camaro is aiming to be the best combination of handling and raw performance, with quick acceleration and competitive fuel economy. "Redesigning the Camaro is thrilling and challenging all at once, but the secret is to offer something more," Mark Reuss, General Motors executive vice president of product development, said in a statement. It all began with a weight-loss plan. The new Camaro shed more than 200 pounds compared with the outgoing car, with 133 pounds coming from a lighter body-in-white. Then engineers culled weight nearly everywhere, using aluminum for the instrumental panel frame and some suspension components to trim as much fat as possible. The slimmer body rests on new bones. The Camaro's rear-wheel-drive platform is lighter and stiffer in a bid to improve handling. It's a modified version of the underpinnings used by the Cadillac ATS, though about 70 percent of the architecture is unique to the Camaro. Chevy said structural rigidity is improved by 28 percent. As you'll see, healthy doses of Cadillac and Corvette technologies have been used to bolster the Camaro's drive character and performance. The new car is also expected to handle better thanks to a slightly smaller footprint. It is about two inches shorter in length, with most of that due to the more compact wheelbase. It's also an inch shorter in height and an inch slimmer in width. So yes, the Camaro will be leaner, but it will still be plenty mean. The Camaro SS tops the range (for now) with the Corvette's 6.2-liter V8 pushing put 455 horsepower and 455 pound-feet of torque. Known as the LT1, is has a cast aluminum block and cast aluminum cylinder heads, and it's fortified with direct injection, variable valve timing, and cylinder deactivation. About 20 percent of the engine's parts are said to be unique to the Camaro, including the exhaust manifolds.