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GM pauses 3.0-liter turbodiesel production due to a supplier shortage

General Motors confirmed it has temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine. It blamed the last-minute pause on a supplier-related shortage. Website TFL Truck first reported the news, and a representative from General Motors quickly confirmed it. The spokesperson explained the issue is due to a "temporary part shortage" and added that production will resume "as soon as possible," meaning the Duramax engine (which is called LM2 internally) is not going away permanently. Additional details are not available, so we don't know if the issue is related to the ongoing chip shortage. Rather than delay deliveries and create a backlog, General Motors is reportedly asking its dealers to encourage buyers who want a turbodiesel engine to instead select either the 5.3-liter V8 or the 6.2-liter V8, depending on the model selected. Both are gasoline-powered units. There's no word yet on when Duramax production will resume. The shortage affects several models, including Chevrolet's Tahoe, Suburban, and Silverado 1500 and GMC's variants of these trucks. Cadillac's Escalade is temporarily diesel-less as well. Heavy Duty variants of the Silverado and the Sierra are not affected because they're powered by a different Duramax engine with eight cylinders. Motorists seeking a full-size SUV powered by an efficient turbodiesel engine are temporarily out of options because the Tahoe/Yukon and the Suburban/Yukon XL had the segment to themselves. The Duramax was surprisingly popular, too: in May 2021, GM Authority reported that the turbodiesel straight-six represented 8% of Suburban sales and 6% of Tahoe sales. Installed in a rear-wheel-drive Tahoe, the engine returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make the body-on-frame behemoth more efficient than the unibody, front-wheel-drive Chevrolet Blazer that's 20 inches shorter and approximately 1,700 pounds lighter. Related video: 2021 Chevrolet Tahoe 3.0L Duramax engine

New V6 engines are only the start at Cadillac

Cadillac debuted its new family of V6 engines Friday, but that's not all General Motors' luxury brand has in store for the coming years. The six-cylinder powerplants will certainly help Cadillac in the near term, but they're just two of the many parts of the company's future strategy. GM has invested $12 billion in Cadillac to help the brand grow over the next five years, and the company will launch eight new products between now and 2020. That all starts with the launch of the CT6 flagship later this year – a fullsize luxury sedan we'll see for the first time in New York on March 31. The CT6 will introduce several new features and technologies to the Cadillac range, and with its launch also begins the slow restructuring of Cadillac's model-naming system. The new nomenclature means CT and XT badges for cars and utilities, respectively. Cadillac says that of the eight new vehicles it plans to launch by 2020, five of them will be first-time offerings in market segments where the brand currently does not play. But it's not just about new products – new powertrains are an important part of the Cadillac story, too. After the new V6 engines – a naturally aspirated 3.6-liter and a twin-turbocharged 3.0-liter engine – launch later this year in the 2016 ATS, CTS and CT6, the company says it has a strategy for V8 power – possibly a twin-turbo application – as well as future electrification. Cadillac also says it's working on adding four- and six-cylinder diesel powertrains, though it's unclear which vehicles will make use of those engines. This new six-cylinder engine family is indeed important, with Cadillac's chief engineer, David Leone, calling it the "most advanced V6 in the industry." With 335 horsepower, the 3.6-liter engine is the highest output, naturally aspirated V6 powerplant Cadillac has done – and that's SAE-certified, and on regular fuel. Beyond that, the 3.0-liter mill (pictured at right) marks the first application of GM's active fuel management system on a twin-turbocharged engine. This means that when full power isn't necessary, the TTV6 can run as a 2.0-liter V4 in order to save fuel. New transmissions are also part of the V6 engine story. GM's all-new eight-speed Hydra-Matic 8L45 gearbox will be paired to the 3.6-liter V6, and the 3.0-liter TTV6 will use the company's existing 8L90 transmission that is already found in the Chevrolet Silverado and GMC Sierra pickups (with the 6.2-liter engine).

Al Capone’s bulletproof 1928 Cadillac Town Sedan is back on the market

It turns out that infamous mob boss Al Capone played an early role in the development of the modern armored executive car, and now there’s another chance to own his bulletproof 1928 Cadillac Town Sedan, which is being offered by Celebrity Cars of Las Vegas for a cool $1 million. It was last seen netting $341,000 at auction by RM SothebyÂ’s in 2012 and does not appear to have undergone significant restoration since then, raising the question of why its value has jumped nearly threefold. Painted green with a black roof, fenders and bumpers, the car is said to be the earliest surviving bulletproof vehicle, with nearly inch-thick glass and once lined (but no longer; read on) with nearly 3,000 pounds of asbestos-wrapped steel armor plating. It features a rear window rigged to drop quickly, so the tough guys in the rear seats could fire on any pursuers. Heavy spring lifts operated the side windows, which were also rigged to raise higher than usual to reveal a circular cutout big enough for the muzzle of a machine gun. In this case, the factory specs may be the least interesting part of the car, though it is undeniably a looker. It features a Series 341-A, 90-bhp, 341 cubic-inch L-head V8 engine mated to a three-speed manual, with a beam front axle and full-floating rear axle with semi-elliptical leaf springs and four-wheel mechanical drum brakes. It has only 1,111 miles on the odometer, having spent much of its history in museums or on display at carnivals and amusement parks. ItÂ’s believed to have flown under the fedsÂ’ radar in a Chicago garage owned by Emil Denemark, a known mafia associate and South Side Cadillac dealer who was related to Capone by marriage, when the mob boss began his slide into legal troubles leading up to his eventual felony conviction and jail time. In 2008, an elderly man named Richard “Cappy” Capstran told a friend that he had once helped his father install armor plating on a Cadillac owned by Al Capone. His father, Ernest Capstran, had repaired another of CaponeÂ’s vehicles and earned the mobsterÂ’s business fortifying the brand-new Cadillac. “My dad said, ‘We donÂ’t do that kind of work here.Â’ And they (CaponeÂ’s men) said, ‘You do now,’” Richard Capstran recalled in a recorded interview, per SothebyÂ’s. CaponeÂ’s associates reportedly also backed the car into the shop so no one could see what kind of work was being done to it.