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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.

2016 Chevy Camaro to drop 200 pounds

The sixth-generation Chevrolet Camaro makes its grand debut on May 16 at a big celebration on Detroit's Belle Isle. Until then, Chevy's strategy seems to be showing off the pony car's new components piece by piece. With the exhaust headers and front end already on display, the Bowtie is now giving a glimpse at some of the upcoming model's aluminum components. The Camaro is going on a diet for its latest generation, and Chevy claims that the switch to the Alpha platform and other new components shed over 200 pounds compared to the current model. That will put the pony car at around 3,500 pounds. The lower weight will contributes to better fuel economy, quicker acceleration and more direct handling, according to the automaker. Among the changes are aluminum front and rear suspension assemblies (pictured above) that weigh 21 percent less than the current units. Also, Chevy promises in its announcement "links on some models feature an intricate, structurally optimized design made with a rigid composite material that's even lighter than aluminum." In addition to these improved parts, the Camaro uses the lightweight metal for the beam that supports the instrument panel to save 9.7 pounds more. The only two pieces reportedly carrying over to the latest design are Chevy's bowtie and SS badges, and at least one engine in the range is known to be a version of the 6.2-liter LT1 V8. With over a month until the next Camaro's debut, we might get a glimpse of even more of the car's new parts in the coming weeks. Related Video: 2016 Camaro Does More with Less New model is at least 200 pounds lighter than current car 2015-03-30 DETROIT – For the all-new, 2016 Chevrolet Camaro, the team was challenged to improve the handling, acceleration and fuel economy of the award-winning current model. To meet all three objectives, the team focused on a singular mission: reduce mass. By obsessively searching for opportunities to save ounces, the team pared more than 200 pounds off the Camaro compared with the fifth-generation model. As a result, the Camaro does more with less, according to Al Oppenheiser, Camaro chief engineer: "We kept the cornering confidence and control that make the Gen 5 Camaro 1LE so fun to drive, and added a greater sense of agility," he said. "The new Camaro brakes harder, flicks into corners more quickly, and drives out of the corner faster.

Porsche and Buick earn top honors in J.D. Power Sales Satisfaction Index Study

Customer satisfaction with car buying has been at a low point over the past few years, as price increases, inventory shortages, and COVID restrictions have complicated every part of the process. There are signs of improvement, however, as J.D. Power’s 2023 U.S. Sales Satisfaction Index Study showed that customer satisfaction has improved slightly from a year ago. J.D. Power rates satisfaction on a 1,000-point scale, finding that it improved seven points to 793 from last year. Improving inventory levels and a slow leveling off of prices have contributed to that improvement, and fewer people are paying above MSRP for new cars. Some auto brands performed better than others with sales satisfaction. Porsche ranked highest among premium brands, followed by Alfa Romeo. Buick took the top spot among mass-market brands, with GMC, Chevrolet, and Mitsubishi behind. J.D. Power also handed out segment-level awards: Premium Cars: Porsche Premium SUV: Porsche Mass-Market Car: Chevrolet Mass-Market SUV/Minivan: GMC Mass-Market Truck: GMC Despite the increase in sales satisfaction, thereÂ’s still room for improvement to reach pre-pandemic levels. J.D. Power noted gaps in salesperson knowledge as an area of improvement. Buyers rated salespeople much better during a gas vehicle purchase than with EVs, citing their expertise as a challenge. Pricing remains a challenge despite an improvement since 2022, and satisfaction is still below pre-pandemic levels. Mass-market buyers reported a slight bump in satisfaction, while premium buyers felt that pricing was less fair than a year before. ItÂ’s an interesting contrast, showing that dealer pricing tactics can significantly impact satisfaction with the sales process. Fewer people may be paying more than MSRP, but several premium models still list with significant markups. Even more interesting is PorscheÂ’s top spot on the satisfaction list, as its cars often sell with huge upcharges, and itÂ’s exceedingly tricky even to get a build allocation for some models. Buick Chevrolet GMC Porsche Car Buying Ownership