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Keller Rohrback has a successful track record of holding car companies accountable for false claims, and we would love to hear from you. If you’d like to learn more about this investigation, please email or call 800-776-6044.

Did you get your General Motors eight-speed transmission serviced, only to have problems continue?


Keller Rohrback is investigating whether Chevrolet, Cadillac, and GMC models from 2015-2019 have faulty eight-speed transmissions. Vehicle owners have stated that defective eight-speed transmissions can cause their cars and trucks to jolt or hesitate, sometimes to the degree that the drivers feel like they’ve been hit by another car.

Many vehicle owners have taken their cars in to have their transmissions serviced, but service has not fixed the issues. Because the issues are not repaired, the cars have developed further problems, leading to mounting costs and frustrations for the owners. General Motors is aware of these issues and has issued thirteen technical service bulletins on the topic, but to no avail.

These transmission problems have been found in both the GM 8L90 and 8L45 eight-speed transmissions and across several GM makes and models. The affected vehicles are as follows:

  • 2015-2019 Chevrolet Silverado
  • 2017-2019 Chevrolet Colorado
  • 2015-2019 Chevrolet Corvette
  • 2016-2019 Chevrolet Camaro
  • 2015-2017 Cadillac Escalade and Escalade ESV
  • 2016-2019 Cadillac ATS and ATS-V
  • 2016-2019 Cadillac CTS and CTS-V
  • 2016-2019 Cadillac CT6
  • 2015-2019 GMC Sierra
  • 2015-2019 GMC Yukon and Yukon XL
  • 2015-2017 GMC Yukon Denali and Denali XL
  • 2017-2019 GMC Canyon

About Keller Rohrback L.L.P.

Keller Rohrback L.L.P. has been appointed by courts to leading roles in the “Dieselgate” cases against Volkswagen and Fiat Chrysler related to diesel vehicles’ emissions systems. With offices in Seattle, Phoenix, New York, Missoula, and Santa Barbara, Keller Rohrback serves as lead and co-lead counsel in class actions throughout the country. Our Complex Litigation Group is proud to offer its expertise to clients nationwide, and our trial lawyers have obtained judgments and settlements in excess of $23.25 billion.

Attorney Advertising. Prior results do not guarantee a similar outcome. Not licensed to practice law in all states. Please refer to for details.


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