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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.

Here's how Detroit is selling more luxury vehicles than Germany and Japan

Now there's an attention-grabbing headline, eh? Although the answer to the riddle - pickup trucks and SUVs - might be somehow deflating, the numbers involved deserve a going over. According to TrueCar's figures (click on the table to enlarge), six of the year's ten best-selling vehicles in the US that sell for a transaction price above $50,000 are body-on-frame, and the Mercedes-Benz E-Class is the only foreigner to crack the top five. Every enthusiast knows that pickup trucks are 'Murica's most popular vehicle by a colossal margin, and there have been plenty of reports about the popularity of luxuriously appointed trucks and SUVs, but compare these figures from TrueCar: 70 percent of Chevrolet Tahoe sales have a transaction price above $50K, and The Bowtie is expected to make $3.9 billion in revenue on 66,945 predicted high-dollar sales; 95.1 percent of E-Class sales break $50K, so the German company will make $4.0 billion on 67,006 predicted sales in that pricing sphere. It's about the only time you'll see the Tahoe ranked right next to Mercedes' bread-and-butter sedan. Ram is ahead of those two with $4.2B coming from $50K-plus sales. The Ford F-Series does almost as much revenue as the next three combined, with an expected $10.8 billion coming from sales of trucks over $50K - more than a quarter of the model's total sales, when a base F-150 can be had for about $26,000. Yes, the Germans make a lot more money on fewer sales, but considering the comparison, the bottom line isn't too troubled by such facts. Weighing like-for-like, the full-size Ford walks it in every category; elsewhere, the Chevrolet Silverado outsells the Ram, but the Ram outsells the Chevy by 6.7 percent above $50K. And for all the flak GMC takes over swapping out grilles, the Sierra also outsells the Chevy in the well-appointed segment, 16.1 percent of sales versus 11 percent – the Professional Grade brand is a huge profit center for The General. You'll find more info in the TrueCar press release below. TrueCar finds pickup trucks far outsell premium brands among top 10 vehicles over $50,000 Ford F-Series pickup sales over $50,000 surpass combined BMW 3, 5, 7 Series luxury car sales SANTA MONICA, Calif. (December 10, 2014) - TrueCar, Inc., the negotiation-free car buying and selling platform, finds mainstream pickup trucks and sport-utility vehicles dominate U.S.

GM recalling 521,817 cars in two campaigns

General Motors is issuing two, separate recalls covering a total of 521,817 vehicles worldwide. The larger campaign covers 468,887 units of the 2011-2012 Chevrolet Malibu. Specifically, 437,045 of these are in the US, and the rest are outside the country. In these sedans, a steel cable that connects the seat belt to the vehicle can fatigue and separate. GM knows of 36 claims about the problem but only one minor injury. According to The Detroit News, this happened when a taxi driver hit his head. To fix things, dealers will replace the "outboard lap mounting bracket," which will move the tensioner rearward. They'll also inspect and if necessary replace the steel cable and lap pretensioner. In the second campaign, 52,930 examples the 2015 Chevy Colorado and 2015 GMC Canyon have seat frame attachment hooks that were installed incorrectly during assembly. GM hasn't received any reports of crashes, injuries, or fatalities about this problem. Dealers will inspect the affected trucks and repair as necessary. GM spokesperson Alan Adler told Autoblog that he didn't yet have a specific date when affected owners would receive official mailings about either of these recalls. GM Statement General Motors is recalling 48,309 2015 model year Chevrolet Colorado and GMC Canyon midsize pickup trucks in the U.S. because certain seat frame attachment hooks were not properly attached to the vehicle body during assembly. Dealers will inspect the potentially affected seats for proper installation and repair if necessary. GM knows of no crashes, injuries or fatalities related to this condition. The total vehicle population of the recall is 52,930 including 4,620 vehicles sold in Canada. General Motors is recalling 437,045, 2011-2012 model year Chevrolet Malibus in the U.S. because the flexible steel cable that connects the safety belt to the vehicle can fatigue and separate over time as a result of occupant movement in the seat. Dealers will replace the outboard lap mounting bracket to relocate the tensioner slightly rearward. Dealers will inspect the cable and, if necessary, replace the lap pretensioner. GM knows of 36 claims, no crashes or fatalities and one minor injury reportedly related to the condition. The total vehicle population of the recall is 468,887 including Canada, Mexico and exports.