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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 Canyon AT4X rumored to get more extreme AEV Edition

When GMC debuted the new 2023 Canyon pickup in August, the midsize lineup gained the hardcore AT4X off-road trim the brand has been spreading throughout its wares. The new top-of-the-line model is GMC's version of the Chevrolet Colorado ZR2 and features the same off-road goodies, like the Multimatic DSSV suspension, unique front fascia, more skid plates, front and rear locking differentials, and a Baja drive mode turning the 33-inch tires. The Edition 1 launch model adds to the production goods by bolting on a front safari bar with a 30-inch light bar, a Comeup winch, an upgraded front skid plate, reconfigurable bed rails, front and rear underbody cameras, and special badging. The Canyon AT4X Edition 1 was gone almost immediately, because of course. However, Muscle Cars & Trucks reports that something just as special could be coming for buyers in the form of a Canyon AT4X AEV Edition. American Expeditionary Vehicles already breathed all over the last-gen Chevrolet Colorado and the current Chevy Silverado, looks like GM not only intends to keep the relationship going but expand it. MCT credits a source for news that the AEV-worked Canyon will get a snorkel and 35-inch tires. Chevrolet offered a snorkel as an aftermarket piece for the Colorado ZR2 Bison, and AEV sold a ZR2 Bison version with a snorkel attached. The new report claims GMC will make the elephant trunk a factory option, fitted to the driver's side this time instead of the passenger's side because of the new engine. The 35-inch tires would be a huge add-on, giving the Canyon the same kind of footprint as the Jeep Wrangler Rubicon Xtreme Recon and a couple of Ford Bronco trims. The additional two inches over the 33-inch tires on the AT4X make a big difference when the trail gets dicey. MCT says the AEV will get the same bumper as the Edition 1, which means a reduced approach angle in return for an integrated winch. The standard AT4X bumper permits a 36.9-degree approach angle, the winch-equipped Edition 1 drops that to 32.8 degrees. It's not clear which winch would hide behind that bumper, though. GMC factory fit is the Comeup Seal Slim 9.5rs rated at 9,500 pounds. AEV offers a Warn 9.5 XP-S with the same weight rating for its Colorado ZR2 Bison.  Speaking of which, since the Colorado arguably started all this, Chevy fans can expect their midsizer to acquire the same bundle as the Canyon AT4X AEV.

Least reliable cars and trucks of 2022

Related: Most reliable cars and trucks of 2022   Every year, Consumer Reports ranks new cars based on their predicted reliability. We often see Toyota, Lexus, and a few other automakers near the top. But on the other side of the coin, the list of least reliable vehicles sometimes contains surprises.   The organization surveys its members to determine the vehicles that exhibited the most problems over the prior year. Owners are asked about creaks and rattles, the durability of parts and trim, and mechanical issues. Consumer Reports assigns a weight to each problem and then uses them to create a score, with 100 being the best. Some familiar names appear on the list of least reliable vehicles (in order with the lowest predicted reliability score at the top), but there are a few eyebrow-raising models, followed by CR's score: Ford F-150 Hybrid: 4 Hyundai Kona Electric: 5 Lincoln Aviator: 8 Nissan Sentra: 9 Ford Explorer: 16 Chevrolet Bolt: 17 Chevrolet Silverado 1500/GMC Sierra 1500: 19 Jeep Gladiator: 21 Mercedes-Benz GLE: 23 Jeep Wrangler: 24 Consumer Reports noted that sedans are the most reliable vehicle category and found that trucks are far lower on the list. That said, the survey showed that trucks from American brands tended to have better reliability scores, so it’s surprising to see GMÂ’s big two and the Ford F-150 on the list. Part of their problematic ownership experience could be due to the fact that all three trucks have received recent updates, and the Ford was completely redesigned for 2022. New tech, fresh drivetrain components, and other improvements can upset the balance of reliability and make newer models look less dependable than their older counterparts. Related video: Green Chevrolet Ford GMC Hyundai Jeep Lincoln Mercedes-Benz Nissan Car Buying Truck Crossover Hatchback SUV Electric Hybrid Sedan Consumer Reports reliability