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2018 Buick Enclave: How engineers made it larger, lighter, more sophisticated

Buick used the unveiling of the 2018 Enclave at the New York Auto Show to introduce its new range-topping Avenir sub-brand to the world. With fancier interior finishes and exterior details, it's Buick's latest effort to make itself a proper luxury brand (or perhaps re-establish itself as such). However, lost in the Avenir song and dance is the fact that the 2018 Buick Enclave is a (very) long-awaited all-new model regardless of the trim level one selects. Like the Chevrolet Traverse upon which it is based, the new Enclave is bigger than the vehicle it replaces but considerably lighter, by about 400 pounds. "We told every engineer, 'get your job done, but then take the weight out,'" said engineer Rick Spina as we hovered next to his larger yet lighter creation. His team therefore set about taking a little bit of weight out from just about everywhere, from using additional aluminum in the suspension to varying the thickness of the frame (thicker in places that needed to be stronger, thinner and therefore lighter in places that didn't). Only about 100 pounds came out of the body with the rest coming from elsewhere. Not only will the reduced weight improve fuel economy (Buick-estimated at 19 mpg combined with FWD versus 18 for the 2017 model) and presumably the old Enclave's rather ponderous handling, but it should only make things easier for the new powertrain: General Motors' now-familiar 3.6-liter V6 and its latest nine-speed automatic. With 302 horsepower and 260 pound-feet of torque, Buick says the new engine will need 7.2 seconds to reach 60 mph with FWD or 7.5 seconds with AWD. That's a second quicker than before. Besides acceleration, towing is also bumped up by 500 pounds to 5,000. For those models with all-wheel drive, the Enclave has the same basic system featured on range-topping versions of the Buick LaCrosse. Besides power being sent front and rear, it can also differ from right to left in the back, although Spina is quick to point out that capability is for traction-enhancing purposes rather than sporty, handling-enhancing torque-vectoring ones. Buick owners already appreciated the Enclave for its quietness so the engineers decided to take it that much further. This included altering the exhaust, improving body sealing (there are triple door seals), including active sound deadening and utilizing advanced materials that absorb sound as opposed to simply being thick, dense and heavy enough to keep it out.

Buick Encore GX expected to come to the U.S. alongside the popular Encore

When we posted on Buick unveiling the Encore GX at Auto Shanghai 2019 as a longer-wheelbase version of the Encore, we though the GX trim could supplant our local Encore. According to Automotive News, citing "sources familiar with the plans," Buick will sell both the Encore and the Encore GX here. Brand boss Duncan Aldred told Buick dealers in January to expect a new model this year, and it appears the slightly larger subcompact crossover is that product. GM Authority reported the same news in March, the outlet saying that Buick intends to re-create in the U.S. the "model family" strategy the carmaker employs in China. Over there, our rebadged Verano sold as the first-generation Excelle, Excelle GT and Excelle GX, the GX being the wagon version of the sedan. When the Excelle trio moved a less expensive platform for the second generation, Buick introduced a Verano model in China in both sedan and Verano GS hatchback forms. AN reported that Buick is also planning a smaller three-row Enclave for China. The Encore GX differs fundamentally from both the Chinese- and U.S.-market Encores. Our Encore, a rebadged Opel/Vauxhall Mokka, rides on the Gamma II platform. The second-generation China-market Encore rides on GM's new Global Emerging Markets (GEM) platform, an updated version of the Gamma II for regions like China and Latin America. The Encore GX rides on the Vehicle Strategy Set - Front (VSS-F) architecture. AN wasn't sure yet where our U.S.-market Encore GX will be built, but doesn't expect it to come from China. The Encore GX here will slide into the lineup between the $23,200 Encore and $31,995 Envision. Whereas the Chinese model aims to stop hemorrhaging Encore sales in China, our version will want to expand the Encore success story. Since it went on sale in 2013, the model has posted double-digit sales increases here every year save for last year. In 2018 the model sold 93,073 units, accounting for 47 percent of brand sales. There's no reason to doubt the Encore GX will boost that number.

GM recalls 3.6 million vehicles for airbag-software problems

The Basics: General Motors is recalling 3.64 million vehicles across its lineup for an airbag-related issue. The recall covers the 2014-2015 Buick LaCrosse, Chevrolet SS, and Spark EV; 2014-2017 Chevrolet Corvette, Trax, Caprice PPV, Silverado 1500, Buick Encore, and GMC Sierra 1500; and 2015-2017 Chevrolet Tahoe, Suburban, Silverado HD, GMC Yukon, Yukon XL, Sierra HD, Cadillac Escalade, and Escalade ESV. The Problem: Affected vehicles have a sensing and diagnostic module that controls the airbags and seat-belt pretensioners. The software it uses has a defect that can prompt the module to run a diagnostic test under specific driving conditions, which will also deactivate the front airbags and pretensioners. This means that it would be possible for those safety systems to not activate in a crash, potentially leading to injury or death. Injuries/Deaths: General Motors began an investigation that led to the recall after a 2014 Silverado was involved in a crash in which the airbags did not deploy. No information was given as to injuries or deaths. The Fix: Owners can bring their vehicles to a local General Motors dealer where a software update will be installed to fix the issue. The fix will be free of charge. If you own one: General Motors will contact owners of affected cars, and owners can check whether their vehicles are affected by visiting entering their vehicle identification numbers at either the GM Owner Center website or the NHTSA website. Owners can then schedule a time to have the update installed. Related Video: