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Cadillac CT6 beefs up with 400-hp twin-turbo V6

Cadillac's engine lineup is set to get a makeover led by the potent powerplants under the hood of the CT6. Our man Steven Ewing is onsite at an event in Detroit reporting all the details. Here's what we know so far: The CT6's top engine will be a 3.0-liter twin-turbo V6. It's the first twin-turbo with cylinder deactivation, which essentially makes the V6 able to convert to a V4 unit. Power will be 400 horsepower at 5,500 rpm and 400 pound-feet of torque at just 2,500 rpm. No word on what a potential CT6-V would get. The CT6 will also have a naturally aspirated V6 that Cadillac is claiming to be all-new. It's rated at 335 hp at 6,800 rpm and 284 lb-ft at 5,300 rpm. That's an improvement of 14 hp and nine lb-ft compared with today's 3.6-liter V6, and fuel economy increases nine percent. Cadillac says it's the highest output for a naturally aspirated V6 that's SAE-certified and runs on regular fuel. Both of these V6s will have stop/start technology and will be paired to with eight-speed automatic transmissions. The 3.6-liter V6 will also be used in the 2016 CTS and the 2016 ATS. Meanwhile, Ewing reports that Cadillac says the ATS-V is actually more powerful than initially announced, though there are no numbers to flesh that claim out as yet. The brand also plans to offer four- and six-cylinder diesel engines in various vehicles and new V8 options. The CT6 bows at the New York Auto Show. It will use an aluminum-intensive body that reduces weight by 198 pounds compared with a steel setup and continues Cadillac's creased design language used on the CTS and ATS models. The CT6 goes into production late this year in Detroit. Related Video: Cadillac Next-Gen V-6 Engines Led by 3.0L Twin Turbo Segment-leading power, efficiency in world's most advanced six-cylinder DETROIT – Cadillac today announced a new generation of V-6 engines, led by an exclusive Twin Turbo V-6 that will be one of the industry's most advanced six-cylinder gasoline engines. It leverages the latest technology to balance efficiency, performance and refinement in the upcoming, top-of-the-range CT6 luxury performance sedan. The all-new Cadillac 3.0L Twin Turbo is designed to achieve new thresholds of refinement and specific output for the brand's new prestige luxury sedan, which makes its world premiere March 31, at the New York International Auto Show. Production begins late this year at General Motors' Detroit-Hamtramck Assembly Plant.

GM alerting truck and sedan owners to a do-over on brake recall

A recall campaign intended to address issues with braking systems on certain 2019 General Motors trucks and sedans may have introduced a new issue, the automaker has acknowledged, and thousands of owners driving repaired vehicles may need to return to their service departments for another update.  The update addresses a fix that was pushed out to owners of more than half a million brand-new GM trucks and sedans that could potentially lose partial braking function, according to the Detroit Free Press. The original software fix helped address situations where the vehicles' anti-lock braking systems would become disabled, which in turn would prevent electronic stability control from activating. Vehicles subject to the recall would often experience software glitches that prevented them from properly communicating the operational state of these systems, meaning drivers would have no idea that their brakes may not behave as expected in an emergency. The 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 were all recalled in the original campaign.  Unfortunately, the early version of this fix appears to have introduced yet another software glitch, indicating that the original fix did not do the trick. Those who have not yet had their cars serviced can rest easy; they will only receive the most up-to-date version of the software fix.  Related video    

Comparing Cadillac's crazy classy coupes

I just returned from the press launch of Cadillac's new ATS-V, a high-performance version of the US luxury marque's entry-level compact car. While ordinary ATVs offer a choice of a 202-horspower, 4-cylinder, a 272-hp turbocharged four or a 321-hp V-6, this one packs a twin-turbo V-6 that pumps out 464 thoroughbred horses and 445 pound-feet of hard-charging torque. Starting at $62,000 for the sedan and $64,000 for the sexy coupe, ATS-Vs are available with a 6-speed manual (with Active Rev Matching and no-lift shift capability) or an 8-speed automatic with steering-wheel shift paddles. They comes with GM's latest 4-mode Magnetic Ride Control, 5-mode Performance Traction Management (with launch control), competition-spec traction and stability controls, an electronic limited-slip differential, specially-tuned electric power steering, huge Brembo brakes, and added air cooling for their engine, transmission, and rear axle lubricants. They roll on 18-inch Michelin Pilot Super Sport tri-compound summer tires on 9-inch-wide front alloy wheels and 9.5-inch-wide rears. And they will rocket from rest to 60 miles per hour in less than four seconds while delivering 16 city EPA miles per gallon and 24 highway with the automatic and 17/23 with the manual transmission. The obvious purpose of all this technology is to effectively endow Cadillac's latest V-Series models with a rarely achieved true dual personality: go, stop, and corner like race cars on a track, then sooth, coddle, and entertain like luxury cars on the way to and from the track, or work. We had ample opportunity to verify both personalities with multiple hot laps of the Circuit of the Americas (COTA) Grand Prix course, followed by a more leisurely drive on public roads near Austin, TX. Even lacking wheel-to-wheel comparisons, we believe these hot new ATS-Vs are fully competitive with their pricier German competitors, and probably superior in some ways. So now, Cadillac will offer not one but two very sharp-looking, upscale, small-volume, 2016 compact coupes, almost the same size and at similar prices, but with totally different missions: this new high-performance ATS-V and the soon-to-be-upgraded ELR extended-range EV. The key question: why? Aside from its cramped back seat and ridiculous $76,000 starting price, I loved the ELR when it was introduced for 2014.