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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.

2019 GMC Sierra 1500 SLE spy shots show new bumpers and tailgate

When the new 2019 GMC Sierra 1500 debuted two weeks ago, GM's truck division showed off just the two top trims, SLT and Denali. While the Denali might be the flagship Sierra, it's not likely to be the volume seller (though Denali models makes up almost a third of total GMC sales). These new spy shots show off the midrange SLE trim. It takes a more conservative, toned-down appearance compared to its brash brethren. The most obvious visual changes come at the front and rear. That big grille remains, but there are just three horizontal bars rather than the busier design from the SLT or Denali. The fog lights have been removed, too, though the C-shapped LED accent in the headlights has carried over. Out back, the SLE trim makes do without the trick MultiPro tailgate (it's limited to SLT and Denali models). It also has a different bumper as the exhaust exits just behind the right wheel. Badging on the fenders indicates that the truck has the updated 5.3-liter V8, meaning it's paired with an eight-speed transmission. The 6.2-liter V8 gets the new 10-speed auto. A 3.0-liter diesel inline-six will be available sometime down the road. GMC hasn't announced pricing, fuel economy or power ratings, but expect to see something in the next few months. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Driving the GMC Canyon, and pour one out for the Camaro | Autoblog Podcast #812

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Road Test Editor Zac Palmer. They start by discussing the the cars they've been driving, including the 2023 GMC Canyon AT4, ECD Jaguar E-Type EV, ECD Land Rover Defender 110 and the Genesis GV60. Next, they hit the news starting with the Chevrolet Camaro production ending. Rumors about the Hyundai N Vision 74 are bandied about, and then the two discuss the latest McLaren iteration named the GTS, which is a refresh of the GT. Lastly, the pair discuss who they think were the most influential leaders in the automotive industry throughout 2023.  Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #812 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving 2023 GMC Canyon AT4 ECD Jaguar E-Type EV ECD Land Rover Defender 110 2024 Genesis GV60 Performance AWD News Chevrolet Camaro productions ends The Hyundai N Vision 74 might reach production McLaren GTS revealed These were the most influential leaders in the automotive world in 2023 Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: Aftermarket Green Plants/Manufacturing Podcasts Chevrolet Ford Genesis GM GMC Hyundai Jaguar Land Rover McLaren Technology Truck Convertible Coupe Crossover SUV Electric Luxury Off-Road Vehicles Performance Supercars