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Stop-start standard in four-cylinder 2015 Chevrolet Impala

Chevrolet has announced that it will include stop-start technology as standard in the entry level 2015 Impala. The result is a nearly five-percent improvement in city fuel economy, also known as one mile per gallon, up to 25 mpg, combined. The 3.6-liter V-6 Impala will not feature stop-start. The 2015 Impala comes equipped with Chevrolet's 2.5-liter Ecotec four-cylinder engine, which will also offer 22 mpg in the city, and 31 on the highway. The 3.6-liter V-6 Impala will not feature stop-start and the mild-hybrid eAssist model from the 2014 MY, which got 29/25/35 combined/city/highway mpg, has been discontinued. Chevrolet spokesman Chad Lyons told Green Car Reports that not even one percent of the 2014 Impalas purchased were the Eco model. So Chevy is trying something different. With a seamless driving experience in mind, the new Impala's stop-start tech features software that governs under what conditions the feature will activate. The engine won't shut off if the car has not reached a speed of six miles per hour, so the start-stop won't be cycling during traffic jams. It can also fire the starter even if the engine has not come to a full stop, which quickens reaction time, particularly in instances of what Chevrolet calls "change-of-mind events." The stop-start function uses information about cabin temperature and humidity as well as battery charge to help determine whether or not to shut off the engine. The 2015 Impala has been engineered to reduce NVH, which will also help create a smoother stop-start experience for occupants, Chevy says. Motor mounts have been updated, and a burlier starter motor will help restart the engine after a stop. The Impala follows the 2014 Malibu as Chevrolet's second vehicle to feature stop-start tech. The four-cylinder model currently makes up over 30 percent of Impala sales. The 2015 Impala will be available beginning this summer, with a base MSRP of $27,735 (including destination charges). And while one MPG isn't a huge difference, neither is the price increase of just $50 for a bit of eco-minded innovation. Read on for more details in the press release below. Chevrolet Makes Stop/Start Standard in 2015 Impala Technology improves city fuel economy by 5 percent 2014-05-22 DETROIT – Stop/start technology will be standard on the 2015 Impala base 2.5-liter ECOTEC® engine, an addition that improves the vehicle's city fuel economy by nearly 5 percent, or one mile per gallon.

GM's latest production delays: Colorado/Canyon, Cadillac CT4/CT5, Camaro

DETROIT — General Motors Co extended production cuts in North America on Wednesday due to a worldwide semiconductor chip shortage that has impacted the auto sector. The U.S. automaker said its Wentzville, Missouri, assembly plant would be idled during the weeks beginning March 29 and April 5. It will extend down time at its plant in Lansing, Michigan, which has been idled since March 15, by two weeks. The action was factored into GM's prior forecast that it could shave up to $2 billion off this year's profit, spokesman David Barnas said. GM did not disclose how much volume would be lost by the move, but said it intended to make up as much lost production as possible later in the year. The chip shortage came as North American auto plants were shut for two months during the COVID-19 pandemic last year and chip orders were canceled, and as demand surged from the consumer electronics industry as people worked from home and played video games. That's now left carmakers competing for chips. Semiconductors are used extensively in cars, including to monitor engine performance, manage functions for everything from steering to automatic windows, and in sensors used in parking and entertainment systems. Vehicles affected by the GM production cuts include the mid-sized pickup trucks, the Chevrolet Colorado and GMC Canyon in Missouri, and the Cadillac CT4 and CT5 and Chevy Camaro cars in Michigan. Meanwhile, GM said its San Luis Potosi, Mexico, assembly plant, idled since Feb. 8, will resume production with two shifts beginning the week of April 5. Last week, GM said it was building certain 2021 light-duty full-size pickups without a fuel management module, hurting their fuel economy performance by one mile per gallon. Exacerbating the shortage is a recent fire at a Renesas Electronics chip plant in Japan. Barnas said GM was assessing the impact of the fire.  

2024 Chevrolet Silverado EV output jumps to 754 hp and 785 lb-ft

A couple of days ago, GMC unleashed its 2024 Sierra EV Denali Edition 1 pickup, the luxury truck division's version of the 2024 Chevrolet Silverado EV. As has been the case between Chevy and GMC for decades, GMC designers worked to put ample visual difference between the two pickups that share the similar underpinnings. Unlike what's been the historical case, GMC announced output figures for the Sierra EV well above those for the Silverado. Preliminary estimates for the battery-electric Sierra with the dual-motor powertrain are 754 horsepower and 785 pound-feet of torque. Chevy revealed the 2024 Silverado EV in January with 664 hp and 785 lb-ft in RST trim. We're not sure what happened after the GMC debut, but the Bowtie has updated the Silverado's output to match the GMC with 754 hp and 785 lb-ft. Chevy truck communications spokesperson Sean Szymkowski submitted a statement to various outlets explaining, "As we prepare for production of the Silverado EV, our engineering team has further refined the estimated performance specs for the 2024 Chevrolet Silverado EV RST First Edition. GM now estimates horsepower to be up to 754 and torque up to an estimated 785 lb-ft when Wide Open Watts mode is engaged." It's possible Chevrolet did so in order to forestall backlash about the disparity, or it's possible the automaker already planned to do so after the GMC dropped. On the ICE side, buyers have got used to powertrain parity, the Silverado and Sierra offering the same engines with the same outputs even with pricing about $3,600 apart on the respective top trims. No matter how the decision was made, the benefits redound to Silverado EV buyers. By the way, the "Wide Open Watts" reference refers to the driving mode required to extract these peak power figures. In the GMC Sierra EV, this is called Max Power Mode. We're still looking for clarity on the output figures in everyday driving modes, we believe those will be the same 510 hp and 615 lb-ft that's the maximum in the lower trim Silverado EV Work Truck.    With a year to wait before the Silverado RST EV reaches reservation holders, and with the Chevrolet Work Truck providing real-world feedback before the RST arrives, don't be surprised at more tweaks made to both the Silverado and Sierra EVs before they hit the market. Related video: GMC reveals the all-electric 2024 Sierra EV