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GM opens official investigation into C8 Corvette transmission leaks

In March 2020, a month after Chevrolet began customer deliveries of the 2020 C8 Corvette, a GM dealer technician created a Reddit thread about a leaking gearbox in a Corvette with 32 miles. That car hadn't even been sold yet. Since then, as a search of "C8 Corvette transmission leak" shows, it's been tales of woe for some owners. Something in the Tremec TR-9080 transaxle in the back of the mid-engined Corvette doesn't work as it should, the fault able to cause codes that the transmission needs service, or that the driver needs to shift to park. In some cases, the battery would die because of follow-on issues after the initial transmission code, that code preventing the car from powering down. As Autoevolution reports, GM filed paperwork with the National Highway Traffic Safety Administration in August to look into what's going on. Between forum threads and GM's investigation document, there are several issues mentioned. The most common appears to be the dual-clutch transmission leaking fluid due to gasket failures like the one suffered by one owner at 858 miles, and another for an owner currently enduring a second leaking transmission. The Midengined Corvette Forum reported that Chevy engineers redesigned the TR-9080 pan, fitting Corvettes with the new unit at some point in the 2021 model year. The original pan was stamped steel unit affixed to the engine with two studs and 13 bolts, plus "reinforcement plates." The updated pan is said to be a cast aluminum unit affixed with two studs and 17 bolts, omits the reinforcement plates, and gets a new machined new groove around its edge to seat the gasket seal. The GM paperwork now at the NHTSA mentions a P1789 code, and says one reason for it could be "debris on the park position sensor magnet causing an incorrect position reading to the TCM." This might be caused by another issue mentioned in forums, which is clogged transmission filters. GM gives instructions for returning transmission filters to the company, and a poster on one forum said the Corvette tech at the dealer where he bought his Corvette told him the automaker "requires every used transmission filter to be returned to GM."  Whatever's going on, the problems haven't stopped, and they go beyond the P1789 code. Over the weekend, a 2022 Corvette owner posted on Corvette Forums that he got a check engine light on his car after just 850 miles.

GM resumes production of its 3.0-liter turbodiesel straight-six

General Motors temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine in August 2021 due to a supplier shortage. Reports claimed the pause would last through 2021, but the engine is already back in production. Enthusiast website GM Authority learned from sources inside General Motors that the straight-six is once again coming off the assembly line at the Flint Engine Plant in Flint, Michigan. There's no official word on precisely what the problem was linked to and whether it was related to the on-going chip shortage that's wreaking havoc across the automotive industry. All we know is that the pause lasted for about two weeks. Called LM2 internally, the six is available in Chevrolet's Tahoe, Suburban, and Silverado 1500 and in GMC's version of these trucks. It's also an option in the Cadillac Escalade. It develops 277 horsepower at 3,750 rpm and a V8-like 460 pound-feet of torque at 1,500 rpm in every application, and it allows these big behemoths to post surprising fuel economy numbers. Fitted to a rear-wheel-drive Tahoe, the Duramax returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make it more efficient than a Blazer. Demand for the diesel-powered trucks is relatively high. While the shortage undoubtedly took a toll on sales, the Duramax represented 8% of Suburban sales and 6% of Tahoe sales in May 2021. There are no other diesel-burning full-size SUVs available new so they have the market to themselves. On the truck side, Ram still makes the EcoDiesel available on some 1500 trims but Ford abandoned the segment. Related Video: Featured Gallery 2021 Chevrolet Tahoe RST View 24 Photos Chevrolet GMC Truck SUV Diesel Vehicles

2016 Chevy Malibu gets premium looks, hybrid model

The Chevrolet Malibu was once an automotive icon, but its modern reputation is one for underachievement. A new 2016 model seeks to restore the storied nameplate with improved styling, more interior room and a new hybrid version. It debuts Wednesday at the New York Auto Show. Put simply, "the goal was to put Chevrolet back in the midsize car segment," said John Cafaro, the brand's executive director of car design. In a crowded arena with 2.2 million sales up for grabs annually, Chevy has not been a player. Last year, the brand sold 188,519 Malibus, a six-percent decline from 2013, and fewer than half the number of Toyota Camrys and Honda Accords sold. Despite awards from J.D. Power and Associates and the Insurance Institute for Highway Safety, Chevy knew the Malibu needed a big change. New Skin, Lighter Bones The redesign has been in the works for at least three years. Although the Malibu is still based on GM's Epsilon 2 platform, the underpinnings are more derivative of the Impala than the outgoing model. The body structure makes greater use of high-strength steel, which helps reduce weight by 300 pounds. Size is more Impala-like as well, with 2.3 inches more overall length and a 3.6-inch wheelbase stretch contributing to greater interior space. A new skin covers the Malibu's lighter bones, and design language from the Impala gives its sibling sedan a fresher, more upscale appearance. To execute this premium appearance, Chevy turned to 25-year-old designer Jaymer Starbody, a four-year General Motors veteran and graduate from Detroit's College for Creative Studies. He described the new Malibu as having a "wheel-oriented" design, and the car looks poised to pounce from certain angles. Though the 2016 Malibu is the same width as before, designers stretched the creases and angles in the sheetmetal to create a flatter, sleeker appearance. The hood and cowl are lower, and the Malibu's face sparkles with LED running lamps on the top trim levels. Inside, the roomier cabin has a new center stack, satin chrome accents on the interior panel and a console storage area designed for mobile devices. Chevy MyLink with a seven-inch color touchscreen is standard on lower trims, and the top model upgrades to an eight-inch screen. Perforated leather seats and ambient lighting are also available options. The cabin was designed to look high-tech, but still remain easy to use, according to Chevy interior design director Crystal Windham.