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GM resumes production of its 3.0-liter turbodiesel straight-six

General Motors temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine in August 2021 due to a supplier shortage. Reports claimed the pause would last through 2021, but the engine is already back in production. Enthusiast website GM Authority learned from sources inside General Motors that the straight-six is once again coming off the assembly line at the Flint Engine Plant in Flint, Michigan. There's no official word on precisely what the problem was linked to and whether it was related to the on-going chip shortage that's wreaking havoc across the automotive industry. All we know is that the pause lasted for about two weeks. Called LM2 internally, the six is available in Chevrolet's Tahoe, Suburban, and Silverado 1500 and in GMC's version of these trucks. It's also an option in the Cadillac Escalade. It develops 277 horsepower at 3,750 rpm and a V8-like 460 pound-feet of torque at 1,500 rpm in every application, and it allows these big behemoths to post surprising fuel economy numbers. Fitted to a rear-wheel-drive Tahoe, the Duramax returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make it more efficient than a Blazer. Demand for the diesel-powered trucks is relatively high. While the shortage undoubtedly took a toll on sales, the Duramax represented 8% of Suburban sales and 6% of Tahoe sales in May 2021. There are no other diesel-burning full-size SUVs available new so they have the market to themselves. On the truck side, Ram still makes the EcoDiesel available on some 1500 trims but Ford abandoned the segment. Related Video: Featured Gallery 2021 Chevrolet Tahoe RST View 24 Photos Chevrolet GMC Truck SUV Diesel Vehicles

The Army goes off-roading with a hydrogen Chevy Colorado

The Chevrolet Colorado is joining the service. General Motors is working with the US Army Tank Automotive Research, Development & Engineering Center (TARDEC) to build a Colorado powered by a commercial hydrogen fuel cell stack, and the Army will use it in "extremes of daily military use for 12 months." TARDEC is the department that tests "advanced military automotive technology" and integrates them into ground systems. The aim is to see how well the benefits of a fuel cell vehicle can be adapted to the battlefield; hydrogen-powered vehicles are quiet, torquey, produce water, and can be used to provide electricity in the field. GM says the design sketch above "foreshadows" the Colorado that will go to boot camp and beyond, making it clear that this won't be the average midsize pickup. The press release below has more. Related Video: GM and U.S. Army to Demonstrate Extreme Off-Road Hydrogen Fuel Cell Chevrolet Colorado Agreement focused on proving unique utility and viability of fuel cell propulsion WARREN, Mich. 2015-11-19 – General Motors and the U.S. Army Tank Automotive Research, Development & Engineering Center (TARDEC) are modifying a Chevrolet Colorado midsize pickup truck to run on a commercial hydrogen fuel cell propulsion system and will expose the truck to the extremes of daily military use for 12 months. "Hydrogen fuel cell technology is important to GM's advanced propulsion portfolio, and this enables us to put our technology to the test in a vehicle that will face punishing military duty cycles," said Charlie Freese, executive director of GM's Global Fuel Cell Engineering activities. Fuel cell propulsion has very high low-end torque capability useful in off-road environments. It also offers exportable electric power and quiet operation, attractive characteristics to both commercial and military use. "The potential capabilities hydrogen fuel cell vehicles can bring to the Warfighter are extraordinary, and our engineers and scientists are excited about the opportunity to exercise the limits of this demonstrator," said TARDEC Director Paul Rogers. "FCVs are very quiet vehicles, which scouts, special operators and other specialties place a premium," he said. "What's more, fuel cells generate water as a by-product, something extremely valuable in austere environments." GM and TARDEC have fuel cell development and research facilities located 20 minutes apart in Pontiac and Warren, Mich.

Best cars for snow and ice in 2023 and 2024

What's the best car for snow? The real answer is "the one with winter tires." What do we mean by that? You could have the finest, most advanced all-wheel-drive system or four-wheel drive in the world, but if you're running all-seasons (the spork of tires), your fancy four-wheeler won't matter much. The odds are, any vehicle on the road running good winter tires will probably perform adequately in slippery, slushy and/or snowy road conditions. (Here's a more complete explanation of why winter tires are totally worth it). In other words, you don't really need any of the cars on this list. With a set of winter tires, countless others will do the job, and even these will be at their best with proper rubber. You can find a variety of winter tires for your car here at Tire Rack. Keep in mind that you will need a full set of four snow tires for safety and performance, no matter what you're driving. The days of your dad putting just two snows on the family truckster to get it moving in a straight line are long gone. Don't get us wrong, getting a car that performs well in snow and ice is still a worthy criteria for car buyers. According to the U.S. Transportation Department, 70% of Americans live in places that get snow and ice. And much of the country has been blasted with arctic air for much of the new year. So let's look at the cars. First, we're highlighting choices for a variety of buyers and price points. Second, we're not just considering snow; we're considering general wintery conditions people will experience driving to work or school. As such, these are all choices with advanced all-wheel-drive systems, usually with "torque-vectoring" systems that not only automatically shunt power front and back, but side to side between the rear axles. Most have extra ground clearance for getting through deep snow, and we prefer those vehicles with more responsive steering, throttles and transmissions that provide a greater sense of vehicle control in slippery conditions.    Acura RDX Read our Acura RDX Review Acura's Super-Handling All-Wheel Drive system was one of the first to offer torque-vectoring, and besides often being touted for its ability to greatly enhanced dry-road handling, its benefits in the slick stuff can be profound. It's actually surprising that Acura hasn't leaned into this capability further by offering more rugged versions of its vehicles.