General Motors (GM) has secured a pivotal legal triumph after a federal appeals court dismantled a large-scale class action lawsuit accusing the automaker of knowingly selling vehicles fitted with defective transmissions.
The ruling, delivered on Friday by the 6th U.S. Circuit Court of Appeals in Cincinnati, narrows the scope of litigation involving nearly 800,000 Chevrolet, GMC, and Cadillac vehicles.
The court’s decision, reached by a narrow 9-7 majority, underscored the considerable differences among the affected vehicle owners, which made it impractical to manage the entire case under a single judicial framework. The lawsuit initially sought to consolidate claims across 26 distinct statewide subclasses and encompassed 59 separate legal claims under various state laws. This diversity in claims and jurisdictions complicated the possibility of proceeding as a unified class action.
Class action lawsuits often provide plaintiffs with a more efficient and cost-effective means of seeking compensation compared to individual lawsuits. However, the court concluded that the variations in the circumstances of each vehicle owner’s claim prevented the case from meeting the legal criteria required for class certification.
The vehicles involved in the lawsuit include GM models from the 2015 to 2019 model years equipped with the 8L45 or 8L90 eight-speed automatic transmissions. Owners reported a range of transmission-related issues, including shuddering and shaking when driving in higher gears, as well as hesitation and jerking in lower gears. These problems reportedly persisted despite multiple repair attempts by dealerships.
The affected models span several popular vehicles such as the Cadillac CTS, CT6, and Escalade; Chevrolet Camaro, Colorado, Corvette, and Silverado; and GMC Canyon, Sierra, and Yukon. These transmission malfunctions have caused considerable frustration among owners, raising concerns about safety, reliability, and resale value.
This ruling overturns a previous decision from August 2024 by Circuit Judge Karen Nelson Moore, who had supported the certification of the class. Judge Moore dissented from the majority opinion, criticising the decision as an attempt to create “insurmountable barriers to certification for plaintiffs who file class-action complaints against national manufacturers.”
The narrow vote also reflected a partisan divide: the nine judges in the majority were appointed by Republican presidents, while the seven dissenting judges were appointed by Democratic presidents.
Following the appeals court’s ruling, the case has been remanded to U.S. District Judge David Lawson in Detroit for further proceedings. This next stage could involve the certification of smaller, more narrowly defined subclasses, allowing for more manageable litigation that addresses the specific circumstances of different groups of plaintiffs.
Transmission issues, in particular, have been the subject of numerous complaints and recalls across the industry. For GM, the court’s decision provides some relief from the prospect of a costly, sprawling class action but does not entirely eliminate the possibility of future legal challenges.