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GM issues stop-sale for 3 SUVs over incorrect MPG rating

This week, GM sent a memo to Chevy, GMC, and Buick dealers to tell them to stop selling three SUVS. The 2016 Chevy Traverse, the GMC Acadia, and the Buick Enclave all have EPA window stickers that show higher fuel economy ratings than the vehicles actually have. Unlike other recent – and very public – fuel economy ratings problems from VW and Mitsubishi, it doesn't seem like GM did anything wrong with the testing for these vehicles, it just misprinted the labels. New labels are being printed and should arrive at dealerships this weekend and early next week. After that, the SUVs will be able to be sold and delivered again. The official fuel economy rating for the three SUVs are all the same. The correct numbers for the all-wheel drive versions are 17 miles per gallon combined, 15 city, and 22 highway. The stickers say the SUVs get 17/24/19. The front-wheel driver models were also incorrectly labeled, and the total number of affected vehicles is 59,823. In the memo, GM said the problem was caused by an "inadvertent error," Automotive News says. GM is working with the EPA to solve the issue. We have asked GM for a comment on the mistake and will update this post if we hear back. Related Gallery 2013 GMC Acadia View 16 Photos News Source: Automotive News – sub. req. Government/Legal Green Buick Chevrolet GM GMC Fuel Efficiency mpg gmc acadia chevy traverse

'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).

GM isn't liable for punitive damages in ignition switch cases

NEW YORK — A federal appeals court said General Motors is not liable for punitive damages over accidents that occurred after its 2009 bankruptcy and involved vehicles it produced earlier, including vehicles with faulty ignition switches. The 2nd U.S. Circuit Court of Appeals in Manhattan said on Tuesday that the automaker did not agree to contractually assume liability for punitive damages as part of its federally-backed Chapter 11 reorganization. GM filed for bankruptcy in June 2009, and its best assets were transferred to a new Detroit-based company with the same name. The other assets and many liabilities stayed with "Old GM," which is also known as Motors Liquidation Co. Tuesday's 3-0 decision may help GM reduce its ultimate exposure in nationwide litigation over defective ignition switches in several Chevrolet, Pontiac and Saturn models. It is also a defeat for drivers involved in post-bankruptcy accidents, including those who collided with older GM vehicles driven by others, as well as their law firms. The ignition switch defect could cause engine stalls and keep airbags from deploying, and has been linked to 124 deaths. A lawyer for the drivers and their law firms did not immediately respond to requests for comment. GM had no comment. Circuit Judge Dennis Jacobs said GM's agreement to acquire assets "free and clear" of most liabilities excused it from punitive damages claims for Old GM's conduct. He also noted that the judge who oversaw the bankruptcy concluded that the new company could not be liable for claims that the "deeply insolvent" Old GM would never have paid. The decision upheld a May 2018 ruling by U.S. District Judge Jesse Furman in Manhattan, who oversees the ignition switch litigation. Drivers have sought a variety of damages in that litigation, including for declining resale values. GM has recalled more than 2.6 million vehicles since 2014 over ignition switch problems. It has also paid more than $2.6 billion in related penalties and settlements, including $900 million to settle a U.S. Department of Justice criminal case. The case is In re: Motors Liquidation Co, 2nd U.S. Circuit Court of Appeals, No. 18-1940. Government/Legal Chevrolet Pontiac Saturn Safety gm ignition switch