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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.

2020 Chevrolet Tahoe, Suburban and GMC Yukon all spied with production lights

One of our spy photographers just caught a smattering of full-size GM SUVs out testing, including the Chevrolet Tahoe, Suburban and GMC Yukon. Previous spy photos of the next-generation of these big GM SUVs have revealed that GM is going with an independent rear suspension design, and these shots confirm the news once again with our best look at the hardware yet. Check them out from the rear, lined up like ducks in a row to see the beefy control arms down there. This will undoubtedly give the big SUVs a more compliant ride, and should bring it back into touch with the refinement from the Ford Expedition and Lincoln Navigator. The new bits we get to see with these shots are production headlights and taillights that are shaping up to look pretty neat. Most distinguishable are the GMC Yukon's LED DRLs. These look a lot like the C-shaped LEDs outlining the headlights on the Sierra, but they have an extra LED strip on top of the C. The parts of the taillights that we can see look significantly different than that found on the Sierra, showing GM is planning on having a great deal of differentiation there. We can sort of see through the mesh covering the grille to what appears to be a classic horizontal bar style front opening. Chevy is predictably dialing the crazy LED strip design back for the Tahoe and Suburban. The parts that are lit up look a whole lot like the headlight fixtures on the 2019 Silverado. That truck uses a stack of lights with the actual headlights separated from the DRLs. We can see the same thing going on here, with the headlight up top and curved LED DRL strip sitting below. It's tough to say if the designs are exactly alike, but we expect to see an extremely Silverado-esque look once all the camouflage comes off. Chevrolet's taillight design differs from its donor truck like the GMC, showing off a curved, vertical series of LEDs out back. Once production lights start popping up like this, we know the vehicle is moving closer to its end game. A reveal sometime later this year could be in the cards for GM's next batch of full-size SUVs. It certainly needs them quick, as Ford rockets ahead with increased Expedition production announced earlier this week.

2016 Chevrolet Malibu Hybrid: 48 mpg for $28,645

With the 2016 Chevrolet Malibu Hybrid, General Motors wants to show it's as serious about mainstream hybrids as it is about mainstream midsize sedans. Keeping with the theme, Chevy announced the Malibu Hybrid will have a serious price tag of $28,645. Chevy said Thursday the 2016 Malibu Hybrid will go on sale in the spring, with that price also including an $875 destination charge. That's about $3,000 more than where the Ford Fusion Hybrid kicks off, and about $2,000 more than a Toyota Camry Hybrid LE. The big news being pushed with the Malibu Hybrid, however, is the fuel economy. GM says it's capable of 48 miles per gallon city and 45 highway, for a combined rating of 47 mpg. That's better than any other 2016 midsize hybrid sedan. Power comes from a 1.8-liter gasoline engine and an electric motor with a 1.5-kWh lithium-ion battery, producing 182 combined horsepower. That's competitive with both the Camry and Fusion. Chevy also likes to say it's roughly the same system as the one installed in the 2016 Volt – although with a smaller battery, larger gas engine, and without the plug – so the Malibu Hybrid has that halo effect going for it. With both this Malibu and 2016 Toyota Prius, there's a lot of activity around gas-electric hybrids amid lowering fuel prices and a raft of plug-ins and full-electrics. The gas-only 2016 Malibu was found to be, "at least good again," so the 2016 Malibu Hybrid should be able to attract those who want a competent midsize sedan with excellent fuel economy that awaits EPA verification. We'll go with that thought until we get to drive it. Related Video: NEXT-GEN CHEVROLET MALIBU HYBRID LT STARTS AT $28,645 Projected to offer 48 MPG city using technologies borrowed from Volt DETROIT – The 2016 Chevrolet Malibu Hybrid LT, which achieves a General Motors'-estimated 48 mpg city, will be available this spring with a starting price of $28,645. "The Malibu leverages knowledge and technology directly from the second-generation Chevrolet Volt," said Steve Majoros, marketing director of Chevrolet Cars and Crossovers. "By leveraging technology, we are broadening our level of expertise and lessons learned to bring consumers a world-class hybrid." With an all-new, hybrid powertrain that uses a slightly modified drive unit and electric motors used in the 2016 Chevrolet Volt, the Malibu Hybrid offers a GM-estimated 48 mpg city, 45 mpg highway – and 47 mpg combined, unsurpassed in the midsize car segment. Official EPA estimates are pending.