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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.

Editors’ Picks October 2022 | Electric trucks and some excellent SUVs

This month sees a bevy of totally new or totally redesigned cars gain Editors’ Pick status. Important EVs like the F-150 Lightning and GMC Hummer EV quickly jump into the list, and they do so with authority, as all our editors love these trucks. The Range Rover is always a superb experience, and this generation proves to be no different. Plus, the new generation of Kia Sportage continues to surprise and impress. In case you missed our previous Editors' Picks posts, hereÂ’s a quick refresher on whatÂ’s going on here. We rate all the new cars we drive with a 1-10 score. Cars that are exemplary in their respective segments get EditorsÂ’ Pick status. Those are the ones weÂ’d recommend to our friends, family and anybody whoÂ’s curious and asks the question. The list that youÂ’ll find below consists of every car we rated in October that earned an EditorsÂ’ Pick. 2022 GMC Hummer EV The Four-Wheel-Steer system lets the 2022 GMC HUMMER EV Pickup m View 17 Photos Quick take: The Hummer amazes as an electric supertruck with its wild acceleration, incredible off-road capability, luxuriousness and epic utility. It's far from a "green" eco-friendly vehicle, but that's not the point of this technological powerhouse. Score: 8.5 What it competes with: Rivian R1T, Ford F-150 Raptor R, Ram 1500 TRX Pros: Stupid quick, tons of tech, off-road capability in spades Cons: Not efficient, annoying in tight spaces, price From the editors: Road Test Editor Zac Palmer — "I don't think I've driven a more ridiculous vehicle this year, but that's sort of the point with the Hummer. There's a great argument against this sort of EV in that it doesn't live up to being an efficient and planet-friendly vehicle, but hey, that's not the point. The Hummer EV is a supertruck and wild technological masterpiece for off-roading in the same way that a mid-engine supercar is to track performance. It's not meant to be the EV everybody drives to work and back (mostly because few can afford it), but it serves as a line in the sand of what can be done with electric off-road trucks. This pickup rules, and if you can afford one, you're going to love it." Senior Editor, Green John Beltz Snyder — "This Hummer revival is a showcase of technology and capability on the part of GM, making it an absolute blast to drive and a joy to use.

GMC adds stylish new Elevation model to 2019 Sierra lineup

GMC has announced a new style-forward model for its forthcoming 2019 Sierra pickup. It's called the Elevation and it will be based off the Sierra double-cab model with a new turbocharged engine, aimed at buyers who want a little panache with their rugged capability. GMC marketing director Rich Latek says the Elevation "conveys a youthful, athletic presence" with the pickup's chiseled fenders and assertive, upright hood. As such, the Elevation gets body-color-matching door handles, bumpers and grille surround, plus black exterior accents like the grille insert, tow hooks, side window trim and standard 20-inch aluminum wheels. Headlights, tail lights and fog lamps will be given the LED treatment, with the former getting the new C-shaped designs that have already been unveiled on other trim levels. It will be offered in two- or four-wheel-drive configurations, with nearly 3 inches more leg room than the current model. A traction select system will use a dial that drivers can set to preset driving modes to adjust transmission shift points, throttle mapping and other systems. An X31 Off Road package will be offered and boasts tuned suspension, a locking rear differential, protective skidplates, dual exhaust and other features. Also available will be a ProGrade Trailering System that includes a Trailering App to help connect and tow a trailer, on top of additional tie-down points, enhanced cargo lighting and other perks for hauling camping or recreational gear. Inside will be a standard 8-inch infotainment system compatible with Android Auto and Apple CarPlay with a six-speaker audio system, plus USB Type A and Type C ports for charging mobile devices. As for the powertrain, it will come with an all-new 2.7-liter turbo inline-four engine that makes 310 horsepower and 348 pound-feet of torque paired with an eight-speed automatic transmission. Also available is a 5.3-liter V8 that uses a new efficient fuel management system that enables it to operate on anywhere from one to all eight cylinders, depending on demand. In early 2019, a new 3.0-liter turbo-diesel inline-six will also be offered, mated to a 10-speed automatic. The Elevation adds to Sierra models like the SLT and Denali that GMC unveiled earlier this year. The company has shaved as much as 360 pounds off the new 2019 model — plus more from the Denali, thanks to carbon fiber in the bed box — so fuel economy should see a boost, too. It goes on sale in the fall.