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GM faces possible class action lawsuit over 8-speed transmission

General Motors has been hit with a class-action lawsuit from owners who allege the eight-speed automatic transmission found in several rear-wheel-drive Chevrolet, Cadillac and GMC models between the 2015 and 2019 model years has a defect that causes the vehicles to hesitate and jerk when accelerating or slowing down. The lawsuit was posted to ClassAction.org and spotted by GM Authority. Problems with GM's Hydra-Matic 8L90 and 8L45 transmissions have been well-documented on Internet forums and via complaints filed with the National Highway Traffic Safety Administration, with many reporting damage to their vehicles. The lawsuit was first filed in December in U.S. District Court for the Southern District of Florida but appears to have been transferred recently to New York. Autoblog sought comment from Theodore Leopold, the lead attorney for the plaintiffs. "These transmissions have a common defect," the complaint reads. "Drivers attempting to accelerate or decelerate their cars feel a hesitation, followed by a significant shake, shudder, jerk, clunk, or 'hard shift' when the vehicle's automatic transmission changes gears." The problem also occurs when the vehicles accelerate in a single gear, without shifting, the plaintiffs allege. "Drivers have reported that the shift is sometimes so violent, they feel as though they have been hit by another vehicle." The problem is believed to center on the transmission, torque converter or both. The complaint says it causes undue friction, causing hydraulic systems and gears to function improperly and sometimes leaves metal shavings throughout the transmission, leading to costly repairs and replacement of parts or the entire transmission. It says GM has known about the problems since shortly after it introduced the transmissions, and has issued 13 technical service bulletins, none of which have resolved the problem. GM declined to comment on the lawsuit. The plaintiffs say GM should have warned consumers about the issues and covered repairs under each vehicle's three-year/36,000-mile bumper-to-bumper warranty. They're seeking statewide classes in at least six states: California, Florida, Illinois, New York, Oklahoma and Texas.

GM claims it's first to sell million 30+ mpg vehicles

As we continue to put together all the data for the year-end edition of By The Numbers, General Motors has announced that it sold more than a million vehicles in the US last year that achieved at least 30 miles per gallon on the highway. More impressively, GM managed this feat using multiple strategies including small vehicle size, turbocharged engines and hybrid or plug-in technologies across four brands (Buick, Cadillac, Chevrolet and GMC) accounting for 13 separate models. This number will grow even more in 2013 thanks to cars like the all-electric Spark, the diesel Cruze, the range-extended Cadillac ELR and the Buick Encore compact CUV.
GM's small car sales were up 39 percent last year helping to attain this million-sales mark for 30-mpg models, and almost 40 percent of all GM sales consisted of cars with fuel-efficient I4 engines. In regards to more advanced means of improving fuel economy, GM says that it plans on having 500,000 vehicles with "some form of electrification" on the road by 2017.
Scroll down for the full list of GM's million 30+ mpg cars as well as an informative press release.

2022 GMC Sierra Denali caught towing in new spy photos

The GMC Sierra 1500 was just redesigned for the 2019 model year, but the hyper-competitive half-ton segment will see an updated Denali offering for 2022 and, as we can see from these spy photos, GMC is already testing prototypes.  There's quite a bit covered up on this particular example, leading us to believe the Sierra Denali's refresh will be on the heavy side. We're not surprised, as GM's usually comfortable position within the full-size segment has been eroded over the past few years, largely due to intrusion into the luxury market on the part of both Ford and Ram.  From these shots, we can tell the Sierra Denali will get at least one new grille (if not several of them), new headlights, new bumpers, new bed sides, new tail lights and perhaps even an updated tailgate, though we expect that will matter more on trucks not equipped with the MultiPro multi-function tailgate option, which tends to take up a lot of stylistic real estate.  As comprehensive as that may sound, it's nothing compared to what GMC has in store for the Denali's upgraded interior. Super Cruise — GM's highway semi-self-driving suite — will headline the updates. This is big news for two reasons. For starters, Super Cruise has thus far been relegated only to Cadillac, so the Denali will likely be among the first outside of that model line to offer it. GM also claims that the version of Super Cruise coming to the Sierra is capable of towing. Yes, hands-free towing. Besides Super Cruise the 2022 Sierra is getting a fully digital instrument cluster as part of what appears to be a fairly comprehensive interior redesign, different from both the current Sierra, standard Yukon and Yukon Denali interiors.  Related Video: