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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.

Inevitable GMC Canyon Denali spotted testing

Practically every other model in the GMC lineup already offers a more luxurious Denali option, so why not extend that to the Canyon midsize pickup? It's hardly a surprise to see the brand doing just that, especially since the standard model seems to be proving quite a success. This Canyon was recently spied testing wearing camouflage over its front end. The truck still needs to breathe, though, and the opening in the obfuscation makes it quite easy to spot the Denali's chrome mesh grille, rather than the horizontal slats of the standard model. Also, just peeking out of the bottom part of the masking is the lower air intake, which appears to be completely lined in chrome now. At the sides and rear, the styling is identical to the current look of the pickup, at least for this prototype. While our spies didn't snap any shots of the interior, it seems safe to anticipate the usual Denali upgrades there, including better materials and additional tech features. Of course, expect a bump in price at the same time to pay for the improvements.

Roadkill pits every project car against each other

The guys behind Motor Trend's monthly Roadkill series have collected nine of their favorite project cars from their videos and pitted them against each other in a battle royale to determine a winner. It's 44 minutes long, but it's completely worth the investment of time.
The cars run the gamut from a 1973 Chevrolet Ramp Truck, a 1975 AMC Pacer and a legitimately impressive 1967 Chevy Camaro, and they are pitted against each other to see which is the fastest around an autocross course. The drivers include Roadkill's two hosts and Motor Trend's Johnny Lieberman and Carlos Lago. It's reminiscent of the best episodes of Top Gear and worth a watch.
So it's the weekend - the perfect time to relax. Grab your preferred beverage, get comfortable and enjoy 44 minutes of some seriously ratty but utterly cool project cars as they are throttled within an inch of their lives (or past it). Scroll down to check out the video.