According to Car Complaints, a total of nine plaintiffs filed this class action lawsuit in the U.S. District Court for the Eastern District of Michigan. The lawsuit filing claims the valvetrain system in affected Small Block V8 engines, as well as the Active Fuel Management and Dynamic Fuel Management lifters, are made up of sub-standard materials that can cause them to fail prematurely. The suit also says the lifters in affected engines were installed in an incorrect position in the lifter guide and do not always conform to design specifications. Plaintiffs claim their vehicles needed frequent valvetrain maintenance, including “more frequent oil changes, engine flushing and cleaning and/or replacing the valve lifter oil manifold and its filter at regular intervals.”
Plaintiffs also accuse GM of using equally as defective parts to repair customer vehicles with, ensuring the valvetrain problems persist even after the necessary repairs and maintenance have been performed. GM also offers a component coverage program to cover the repair costs due to the widespread nature of valve lifter problems in its Small Block V8 engines, however customers are only entitled to component coverage after they’ve had their vehicle’s valvetrain repaired twice previously – something the plaintiffs are also not happy about.
This class-action lawsuit includes vehicles equipped with either the GM 5.3L L83 or 6.2L V8 L87 engines, or the older 6.0L Vortec V8 L96 motor. This lawsuit also includes vehicles equipped with the performance-oriented 6.2L LT1 V8 engine in the sixth-generation Camaro and C7 Corvette Stingray and C7 Corvette Grand Sport, along with the supercharged 6.2L LT4 V8 in the 2016 to 2019 model year Cadillac CTS-V and C7 Corvette Z06.
GM Authority has received countless complaints from GM vehicles owners regarding valve lifter issues in certain GM V8 engines. This latest lawsuit calls for GM to issue a product safety recall to address the widely reported problems, however the automaker has so far only issued technical service bulletins instructing dealership technicians how to diagnose and repair these reported problems.