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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.

GMC has received 65,000 Hummer EV orders so far

The GMC Hummer pickup truck only just went on sale, and already there's word from company brass that demand is higher than expected. According to a report from CNBC, Duncan Aldred, global vice president of GMC, said the automaker has received more than 65,000 combined orders for the current electric truck and upcoming SUV. What's more, the number of customers converting reservations into orders is humming along at 95%, which is also higher than the company projected. "Production’s actually slightly ahead of plan and weÂ’re putting things in place now to actually expedite that as well, so we can deliver these reservations quicker than we originally thought," Aldred said, adding that new orders placed today probably won't result in a delivered vehicle until 2024. "WeÂ’re doing all the studies on that and weÂ’re confident we can go a lot quicker than we originally thought," Aldred said, "But it still means a reservation now probably means delivering in Â’24." The version of the Hummer pickup that's currently being built is the highest-spec Edition 1 model. That truck ran at least $110,295, but since it's already sold out, new customers will be looking at Hummer EV 3X that starts right around the $100,000 mark before any optional equipment is added (and assuming you can find a dealer that won't try to jack up the price). At some unspecified point in the next year or so, GMC will start building a lower-cost Hummer 2X for $89,995. A year or so later, the  $79,995 Hummer EV 2 will make its debut. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2024 GMC Acadia gets bigger, goes entirely turbocharged

For an entire generation now, the GMC Acadia, the brand's largest unibody SUV, has sat in an unusual zone in between the typical midsize two-row and large three-row segments. But the completely redesigned 2024 Acadia is stepping confidently into the latter camp, growing to roughly match its cousin, the also fully redesigned 2024 Chevy Traverse. And adding to its greater size and performance, the Acadia brings unique exterior and interior design. The size increase is impressive. The wheelbase has grown 10.6 inches, overall length by 8.4, and overall height by 3.2. GMC claims this has increased cargo space by 80% and second-row seat room by 27%. These changes all make it about the same size as the Chevy, too, instead of a smaller option.  This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. That doesn't mean the two look the same, though. The front fascia clearly borrows heavily from the GMC Sierra 1500 with a tall grille and C-bracket headlights. The flanks really depart from the aggressive shape of the Traverse. It also skips the fat C-pillar. GMC designers noted they specifically worked to reduce the size of that pillar, in part to improve visibility for third-row passengers. Conversely, the D-pillar is relatively large and is finished in body color to reveal it. But to keep it from looking overly large, there's a black plastic panel that helps give the rear window a bit of a wraparound effect. The taillights also have a gloss black panel to blend them into the rear window area and reduce the visual mass of the hatchback. The interior is the biggest differentiator between the Traverse and Acadia, though. The entire dashboard is unique to the Acadia. The 11-inch instrument display sits under a cowl that extends horizontally to meet the unique vertical 15-inch infotainment screen. That screen overlaps a squared-off, horizontal dash design, and it's flanked by vertical air vents. The Acadia picks up a column-mounted shifter, too, freeing up space for storage in the center console. There are practically no parts directly pulled from other GM products. And unlike GM's upcoming EVs, the Acadia will have Apple CarPlay and Android Auto functionality. Individual Acadia models even have unique features. The luxury Denali trim and off-road focused AT4 trim both return. The AT4 stands out the most with an extra inch of ground clearance in part from the all-terrain tires on 18-inch wheels.