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GM removes start/stop from full-size trucks and SUVs with V8 engines

GM is removing start/stop technology from a number of its popular full-size SUVs due to the ongoing chip shortage. This follows the removal of cylinder deactivation technology from some of its trucks, which was also due to the chip shortage. GM Authority first reported the news, but we’ve just confirmed everything with a GM spokesperson.  The following 2021 model year vehicles will be affected: Chevy Tahoe, Chevy Suburban, GMC Yukon, Cadillac Escalade, Chevrolet Silverado 1500 and GMC Sierra 1500. Only versions of those vehicles built with the 5.3-liter V8 or 6.2-liter V8 and mated to the 10-speed automatic will have the tech removed from them. Only vehicles manufactured on or after June 7 will be affected. “By taking this measure, it will enable us to continue production of our high-demand full-size SUV and pickups as the industry continues to rebound and strengthen,” GM said in a statement. Those who ultimately buy one of these vehicles without start/stop technology will receive a $50 discount off MSRP for their troubles. Losing this fuel-saving tech could be a big negative for some, but we know many folks turn it off anyway. Not having to press the button to deactivate start/stop every time could actually be a positive if youÂ’re part of the camp who does that already. 2021 Cadillac Escalade Sport Platinum View 27 Photos On the downside, GM says “most of the affected vehicles will experience a minor reduction in fuel economy.” We donÂ’t have revised window stickers in hand to know how each model will be affected, but any 1 mpg reduction will be rather impactful for vehicles rated as low as these trucks already are. Any reduction will be seen in the city mpg rating, so take the kind of driving youÂ’re going to be doing into account before purchasing. When it comes to greenhouse gas compliance rules, GM says it doesnÂ’t foresee this impacting the companyÂ’s average fleet score. It also intends to begin adding start/stop back to these models as soon as possible, but there will be no retrofit effort made to fit the tech to vehicles already built without it. “Our supply chain organization continues to make strides working with our supply base to mitigate the near-term impacts of the semiconductor situation,” GMÂ’s statement reads. “GM continues to leverage every available semiconductor to build and ship our most popular and in-demand products, including our highly profitable full-size trucks and SUVs for our customers.

GM and Isuzu to partner for medium-duty commercial truck

General Motors is returning to the medium-duty truck business in the US for the first time since 2009 thanks to a new deal with longtime-partner Isuzu. The arrangement brings the Isuzu N-series models to Chevrolet dealers with the Bowtie's branding on them in 2016. There are six medium-duty Chevy models arriving at dealers in regular cab and crew cab bodies: the 3500, 3500HD, 4500, 4500HD, 5500, and 5500HD. The trucks will be sold as a bare chassis for buyers to outfit to their needs. Depending on model, customers will have the choice of an Isuzu-sourced 3.0-liter and 5.2-liter diesel engines or a 6.0-liter V8 gasoline-fueled engine from GM and six-speed gearbox. According to company spokesperson Bob Wheeler to Autoblog, the diesel models will be built in Japan and the rest assembled from knockdown kits in Charlotte, MI. This kind of vehicle sharing isn't uncommon for GM in the commercial segment, and it already partners with Nissan to use the Japanese brand's NV200 as the City Express van. The General also once owned a significant stake in Isuzu, and the two have remained collaborators even since then. Isuzu and GM Enter Commercial Vehicle Collaboration Agreement in the U.S. 2015-06-15 DETROIT and FUJISAWA, Japan – General Motors Co. (NYSE: GM) and Isuzu Motors (TSE 7202) have reached an agreement on a U.S. commercial vehicle collaboration, allowing Isuzu to strengthen its product lineup and GM to expand its commercial vehicle portfolio. Isuzu will produce low cab forward models for GM, based off of the Isuzu N-Series. The vehicles will be distributed by participating Chevrolet dealers in the U.S. market starting in 2016. To strengthen the product lineup, GM and Isuzu will explore the use of GM commercial vehicle components for Isuzu low cab forward trucks and GM will continue to produce and supply the 6.0L V-8 gas engine and six-speed transmission for Isuzu gasoline-powered low cab forward trucks. Isuzu and GM have maintained a strategic partnership for more than 40 years, producing collaborative business opportunities throughout the world. This agreement continues that tradition and reinforces a long-term relationship that helps to explore future collaborations in the U.S. commercial vehicle business. About General Motors General Motors Co. (NYSE:GM, TSX: GMM) and its partners produce vehicles in 30 countries, and the company has leadership positions in the world's largest and fastest-growing automotive markets.

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).