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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.

Camo'd Chevy Camaro ZL1 is one bad boy

Thanks to a fresh gallery of spy shots, we're getting a much better look at the next Chevrolet Camaro ZL1 during its development, and this machine is looking seriously mean. Unlike the last photos, the heavy cladding is gone from the body this time and is replaced by a camouflage wrap. That switch makes checking out the details a whole lot easier. The first thing you'll notice at the front is the massive grille that looks ready to devour anything that gets in the way. To add a little more menace, the lower air dam appears to jut out a bit more, as well. While harder to see in these latest shots, our spies say the hood still boasts an extractor similar to what's found on the Cadillac CTS-V. The big, double spoke wheels look great in black and really dominate the styling in profile. Look past them, and you notice some tweaked side sills, as well. At the very back, you can also spot some styling adjustments to the rear bumper. There's an unmissable wing back there, too. The powerplant for the ZL1 is still a mystery, but it's rumored to use the LT4 6.2-liter supercharged V8. The similar hood design as the CTS-V is one piece of evidence to support that. Even with the same engine, Chevy's engineers could tweak the output higher or lower than the Caddy. The wait to find out isn't too long because the ZL1 is anticipated to launch for the 2017 model year. Related Video:

2018 Woodward Dream Cruise: What to know and where to go

If there's anything that proves Detroit's motor-oil-in-the-veins, gearhead bonafides, it's the annual Woodward Dream Cruise, which will bring an anticipated 1.5 million or so people from near and far, plus tens of thousands of classic and custom and just plain weird cars, to a 16-mile portion of Woodward Avenue on Saturday for the 24th year. Loved by gearheads, collectors and the merely curious, who see it as the Motor City's version of Mardi Gras, and loathed by others, who deride it as the world's largest traffic jam, the Dream Cruise is nothing if not an explosion for the senses. What will you see there? Well, as Autoblog Managing Editor Greg Rasa put it last year, "There are historic cars. And works of art. Some are worth vast sums of money, and some are rat rods and rust buckets. And some are bizarre creations that make you ask, 'What were they thinking?'" A few things are certain: You will see many incredible automobiles. There will be plenty of T-shirts and other merch, official and not-so-much. It will be crowded, and probably hot. The Cruise will officially go from 9 a.m. to 9 p.m., though of course cruisers have been out already for weeks. And there are plenty of attractions, both on and off the pavement of Woodward. Tony Michaels, the Dream Cruise's executive director, said the event is special for the Detroit region. "Together we celebrate the automobile and what it has meant to us," he told Autoblog. "To see the these fantastic vehicles and the proud owners says so much about who we are and our pride. "People should take it in to see history running 16 miles down Woodward Avenue and to be a part of the greatest automobile event in America." Ford is once again serving as the Dream Cruise presenting sponsor and will hold the 20th anniversary of the Mustang Alley at the corner of Nine Mile and Woodward in Ferndale, where it expects as many as 1,000 Mustangs to line up. It will also show off its lineage of trucks at 13 Mile, along with several performance vehicles at Duggan's Irish Pub at 31501 Woodward in Royal Oak. The company on Thursday unveiled the 2018 Mustang Cobra Jet drag car to celebrate the nameplate's 50th anniversary. Just 68 examples are planned of the $130,000 limited-edition model Other Ford activities include: Sales of tickets for a raffle of a one-off Kona Blue Mustang Bullitt, starting at the media clubhouse at 2 p.m. Friday. The raffle itself takes place in November and will support juvenile diabetes research.