--- title: "GM transmission class-action lawsuit officially filed" url: "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/" publisher: "Pickup Truck + SUV Talk" content_signal: "search=yes, ai-input=yes, ai-train=no" author: "Jimmy Dinsmore" published: "2022-01-19T15:00:13+00:00" modified: "2025-07-23T15:15:06+00:00" image: "https://pickuptrucktalk.com/wp-content/uploads/2022/01/2016-Cadillac-CT6-Powertrain-AutoTrans-001.jpg" --- # GM transmission class-action lawsuit officially filed By Jimmy Dinsmore Published: 2022-01-19T15:00:13+00:00 Updated: 2025-07-23T15:15:06+00:00 ![Featured image]() Now with more than 60 technical service bulletins (TSBs) filed related to GM’s Hydra-Matic 8-speed transmission, a class action lawsuit has been filed against the automaker. Harper, et al., v. General Motors, LLC. was filed in the U.S. District Court for the Eastern District of Michigan, according to [CarComplaints.com](). We [covered this issue last year](), but now it seems like this will proceed to some kind of court resolution. GM seemed to [acknowledge this issue]() when it replaced some 8-speed transmissions in some GMC Sierras and Silverados, but that’s as far as the automaker has gone at this point. ### **Hard shifting at the heart of the complaints** When the words “slip, buck, kick and jerk” appear as it relates to a transmission shifting, that’s never a good thing. The full legal wording related to the GM 8-speed transmission says: ” (the transmission will) slip, buck, kick, jerk, harshly engage, suffer abnormal internal wear, sudden acceleration, delay in downshifts, delayed acceleration, difficulty stopping the vehicle, and eventually require replacement of the transmission or its components.” The plaintiffs claim the transmissions cause safety hazards and expensive repairs once the 8-speed transmissions fail. According to the lawsuit, the shuddering, shaking, jerking and hesitation comes from internal problems within the transmission and torque converter. And a judge who refused to dismiss the lawsuit said: “plausible inferences may be drawn that GM had substantial knowledge of this issue.” ### **What vehicles are impacted in the GM transmission lawsuit?** The 8-speed transmission lawsuit includes these models. - 2015-2019 Chevrolet Silverado - 2017-2019 Chevrolet Colorado - 2015-2019 Chevrolet Corvette - 2016-2019 Chevrolet Camaro - 2015-2019 Cadillac Escalade and Escalade ESV - 2016-2019 Cadillac ATS, ATS-V - 2016-2019 Cadillac CTS, CTS-V - 2016-2019 Cadillac CT6 - 2015-2019 GMC Sierra - 2015-2019 GMC Yukon, and Yukon XL, and Yukon Denali XL - 2017-2019 GMC Canyon The good news is newer vehicles don’t seem to be impacted, but this lawsuit, which has been ongoing for three years, is not going away. Additionally, there hasn’t been a full-fledged recall from GM. Details from the lawsuit filing alleges “a GM insider said the automaker was aware some transmissions are defective and is working on a kit to fix the fluid starvation problem internally but has done nothing to inform owners of the potential dangers of erratic shifting.” Further, the filing asks General Motors to “stop selling all the vehicles and replace all the 8-speed transmissions with new non-defective transmissions.” Additionally, the plaintiffs argue owners should be awarded “actual, compensatory, exemplary, and statutory damages, including interest, including damages for economic loss including loss of the benefit of the bargain, overpayment damages, diminished value and out-of-pocket losses.” Here are the law firms handling the case: Cohen Milstein Sellers & Toll PLLC, Gordon & Partners, P.A., Berger Montague PC, Capstone Law APC, The Miller Law Firm, P.C., Kessler Topaz Meltzer & Check, LLP, LLP, Keller Rohrback L.L.P., and Pitt, McGehee, Palmer & Rivers, P.C. IF YOU ARE AN AFFECTED OWNER, CLICK [HERE]() TO VISIT THE COHEN WEBSITE TO BE NOTIFIED OF UPDATES. ### The bottom line on the GM transmission lawsuit We wrote about this time last year that the saga continues. And now, 12 months later, the sage still continues. It’s understandable GM is holding its ground on this, as what’s being alleged and asked would prove to be incredibly costly. However, the fact this suit has not been dismissed by a judge shows there is some merit to it. Surely, things will play in court in some regard. Without a last-minute dismissal, I’d expect some kind of settlement as things like this generally don’t go well if they make it to a trial. GM would be wise to get this entire situation dealt with and put to bed once and for all. **Related posts:** - [How reliable is the GMC Sierra 1500?]() - [Another lawsuit filed over GM Shift to Park feature]() - [Recall: Ram Pickups Shift Out of Park]() ## Structured page information ~~~json [ { "@context": "https://schema.org", "@graph": [ { "@type": "Article", "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/#article", "isPartOf": { "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/" }, "author": { "name": "Jimmy Dinsmore", "@id": "https://pickuptrucktalk.com/#/schema/person/554adb85fc153c3f1a5f7b587db5e128" }, "headline": "GM transmission class-action lawsuit officially filed", "datePublished": "2022-01-19T15:00:13+00:00", "dateModified": "2025-07-23T15:15:06+00:00", "mainEntityOfPage": { "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/" }, "wordCount": 659, "commentCount": 74, "publisher": { "@id": "https://pickuptrucktalk.com/#organization" }, "image": { "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/#primaryimage" }, "thumbnailUrl": "https://pickuptrucktalk.com/wp-content/uploads/2022/01/2016-Cadillac-CT6-Powertrain-AutoTrans-001.jpg", "keywords": [ "8-speed trans", "chevrolet colorado", "chevrolet silverado", "General Motors", "GM", "GM lawsuit", "GM transmission lawsuit", "gmc sierra", "gmc yukon" ], "articleSection": [ "News" ], "inLanguage": "en-US", "potentialAction": [ { "@type": "CommentAction", "name": "Comment", "target": [ "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/#respond" ] } ] }, { "@type": "WebPage", "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/", "url": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/", "name": "GM transmission class-action lawsuit officially filed", "isPartOf": { "@id": "https://pickuptrucktalk.com/#website" }, "primaryImageOfPage": { "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/#primaryimage" }, "image": { "@id": "https://pickuptrucktalk.com/2022/01/gm-transmission-class-action-lawsuit-officially-filed/#primaryimage" }, "thumbnailUrl": "https://pickuptrucktalk.com/wp-content/uploads/2022/01/2016-Cadillac-CT6-Powertrain-AutoTrans-001.jpg", "datePublished": "2022-01-19T15:00:13+00:00", "dateModified": "2025-07-23T15:15:06+00:00", "description": "Class action lawsuit filed and goes forward against GM for 8-speed transmission issue. 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