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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.

Chevrolet Suburban Luggage Test: How much fits behind the third row?

From the very beginning of doing these luggage tests, I specifically had no intention of doing one for the Chevy Suburban or any extended-length full-size SUVs. Quite simply, there was no question that my six suitcases were going to fit behind the third row. And not only that, I was pretty confident there'd be a ton of space left over, much as there is in mid- and full-size two-row SUVs.  And yet, you know what vehicle I've received more requests for cargo-related information about over the years? That's right, the Chevrolet Suburban. Sure, it's not exactly BTS fan mail volumes, but it's more than anything else. Apparently, people want to know how much fits in the back of a Suburban (or GMC Yukon XL ... or Cadillac Escalade ESV). So, when a Suburban popped up in the press fleet I decided to finally give the people what they want.  As a reminder, this is the amount of cargo space behind the THIRD row of a Suburban. Chevrolet says this is 41.5 cubic feet, and it sure looks like it.  For the record, the most stuff I've ever put into the back of a three-row vehicle is a Honda Odyssey, which has 32.8 cubic feet of space. I never did another minivan after that, for reasons effectively described above. And no one has asked for it. Now, because I'm greedy, I lifted up the floor to see if there's any underfloor space. Wow, there is! Theoretically, it could lower the floor a bit and allow for even more stuff, but the floor's hinges don't allow it. Unlike those in a BMW that can be propped into an upright position, these'll just drop the floor back down again. That's OK, I won't use this then. Let's get to the bags. As with every Luggage Test, I use two midsize roller suitcases that would need to be checked in at the airport (26 inches long, 16 wide, 11 deep), two black roll-aboard suitcases that just barely fit in the overhead (24L x 15W x 10D), and one smaller green roll-aboard that fits easily (23L x 15W x 10D). I also include my wife's fancy overnight bag just to spruce things up a bit (21L x 12W x 12D). So yeah, it all fits. No surprise there. In fact, there's even more room leftover than I anticipated.  Let's go to the extra (and imaginary) items, then! First up, the trusty 38-quart Coleman cooler. This added to my bags, plus maybe a duffle bag, is what big "compact" SUVs like the Kia Sportage and Toyota RAV4 can manage.

NHTSA ends GM steering investigation without seeking a recall

DETROIT — U.S. safety regulators have closed an investigation into sticky power steering on thousands of older General Motors SUVs and will not seek a recall. The National Highway Traffic Safety Administration says GM in 2014 issued “special coverage” to fix the problem on the Chevrolet Equinox, GMC Terrain and other models. The coverage replaced a steering gear with an improved one. The agency said a recall isn't needed because of the coverage and low complaint and warranty repair rates. The agency opened the probe in June of 2020 into steering problems affecting an estimated 781,000 of the SUVs from the 2010 through 2012 model years. Increased friction could make it feel like the steering wheel is stuck. But GM said the SUVs could still be turned, although with more effort than usual. “In view of the special coverage, low rate of failure and low potential hazard to drivers, this preliminary evaluation is closed,” the agency wrote in documents posted Wednesday on its website. Government/Legal Recalls Chevrolet GMC Safety