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Nissan Sentra, Buick LaCrosse to headline LA Auto Show

We're less than a month away from the start of the Los Angeles Auto Show, and automakers have been lining up their debuts for the upcoming left-coast expo. The latest announcement comes from the show's organizers who are eager to tout the global debuts slated for next month. Chief among them will be new versions of the Buick LaCrosse and Nissan Sentra. So far all we've seen of the 2017 LaCrosse is a glimpse at the front grille, but it's already promising to bring elements of the Avenir concept to the street. The original LaCrosse was launched in 2004 and was replaced in 2010 with the current model. The Sentra nameplate has been around much longer, but the current model was launched more recently in 2013. The new version spied recently while undergoing testing is promised to be a substantial update on that model, not a complete replacement, bringing it up to speed with the latest equipment and revised styling. This represents the first official confirmation we've received of when Nissan will be unveiling the new Sentra. Mitsubishi will also be on hand with its new Outlander Sport, as well as the redesigned Mirage. They'll be joined as well by new versions of a couple of high-end models that promise to resonate with the local crowds in tinseltown. Land Rover has chosen the LA show as a suitable venue to unveil the production Range Rover Evoque Convertible that will drop the top on one of the most stylish luxury crossovers on the market. And Porsche, as we know, is gearing up to hit the track with the new Cayman GT4 Clubsport - a customer racing version of the company's little two-seat, mid-engined sports car that's been lightly modified for motorsport competition. Of course these won't be the only new metal on display at the Californian auto expo. They'll be joined as well by the likes of the new Infiniti QX30, Hyundai Elantra, Kia Sportage, and Jaguar F-Pace - many of which we've already seen. Meanwhile companies like Fiat, Ford, Mazda, Mercedes, Subaru, Volvo, Volkswagen, and Elio Motors are keeping their plans under wraps for the time being. But with mere weeks to go, it won't be long before we see what they've got in store as well.

Refreshed 2019 Buick Envision gets sharper edges, optional nine-speed transmission

After 18 months on the market in the United States, the Buick Envision took its place as the third-best-selling vehicle among Buick's eight models, slotting in behind the Encore and Enclave. January sales this year jumped 13.7-percent year-over-year, just a few hundred behind the Enclave. Now, the Chinese-made compact SUV gets a modest makeover, but buyers of the 2019 Buick Envision will need to reach up into the upper trims to access the best of what's new. The big mechanical upgrade comes with the option of GM's Hydra-Matic 9T50 nine-speed automatic instead of standard the six-speed. However, that appears to be limited to just two of the five available Envision trims: Premium I and Premium II. The base, Preferred, and Essence models stick with the six-speed only. Design changes center around the front and rear fascias. The grille motif switches to a be-winged Buick emblem - in tri-color spec, not monochrome - over the previous waterfall, matching that of the sibling crossovers. The lower front fascia gets redrawn, with the fog lights at the edges now sitting in square recesses with reworked chrome trim and sharper edges on the bumper. Premium trims move up from HID projectors to bi-LED headlights, while the other three trims shed their composite halogens for HID lights. According to the 2019 order guide, Ebony seats with Dark Plum interior accents leave the menu, replaced by Dark Galvanized leather seats with Ebony trim. White interior lighting will illuminate the instrument panel and door trim, replacing Ice Blue, and comfort/convenience tweaks come in the form of wireless phone charging, an cabin air ionizer and a button to shut off the stop-start system. The latter would be a noteworthy upgrade as it's been a common complaint logged against so-equipped GM vehicles. In back, design elements get sharper edges, and the taillights switch to slimmer LED units. Designers have hidden the single exhaust outlet on the lower three trims with the base, 197-horsepower 2.5-liter engine. It appears that choosing the optional, 252-hp 2.0-liter engine will be identified by dual rectangular exhaust finishers instead of the round tips of previous years. Exterior colors hold steady at six, but Midnight Amethyst Metallic gives way to Satin Steel Gray Metallic, and the current 19-inch wheels get replaced with two new designs. The 2019 Buick Envision has already gone on sale in China, and should reach U.S. dealers in April. Related Video:

2019 Buick Regal GS Review | Because Buicks are allowed to be cool, too

Buick continues to try to convince everyone that its cars are cool, but we still haven't seen much evidence of this working. However, the 2019 Buick Regal GS is exactly the car that can help change people's minds about Buick in 2019. It has big red Brembos sitting inside superbly stylish wheels, bright red GS emblems everywhere, aggressive bodywork and some of the best sport seats in any car today. Buick truly made the GS look the part, and if you can get past the brand's Wal-Mart greeter personality, you're going to like the way it drives, too. The Regal GS is powered by GM's 3.6-liter V6 that makes a healthy 310 horsepower and 282 pound-feet of torque in this application. That gets mated to a nine-speed automatic transmission, which is the only option for the GS this time around. The previous generation Regal GS offered a six-speed manual, but we weren't missing it too badly here. With seemingly every car under the sun going the turbocharged route, it was refreshing to see GM use a big, naturally aspirated V6. Even stranger was that the Regal GS before this one was boosted, so you could say GM went the opposite direction of the industry trend. That previous GS made 270 horsepower and 295 pound-feet of torque from its turbocharged 2.0-liter four cylinder. So, while the V6 beats it by 40 horsepower, the old GS has it by 13 measly pound-feet of torque. Still, we dig the V6, because this car's power delivery is fantastic with a snarly but restrained exhaust note to go with. My largest quibble is taking off from a stop. The GS's throttle response is a little numb from the get-go, but put any revs to it and the car is ready to leap forward at any speed. This immediacy is increased when you put it into "GS" mode, which sharpens up the throttle, quickens shifts, stiffens the suspension, sends more power to the rear wheels and makes the steering heavier. The nine-speed is seamless and unobtrusive in traffic, but offers up surprisingly quick shifts when you're flat-out. Most of the time I end up ignoring the paddle shifters on cars with torque converter automatics, so I wasn't exactly missing them here. You can select the gears via the gear lever's slapstick function if you really want to, but it's hardly more engaging than just letting the car go at it. In GS mode it holds gears long enough and resists shifting out of the power band. During fall-attack on a backroad, it works smart and is on-par with the eight-speed in our Stinger GT long-termer.