— GM 8L90 and 8L45 transmission problems have caused a proposed class action lawsuit that alleges the 8-speed transmissions are defective in the following vehicles in California, Illinois, Michigan, New Jersey, New York and Texas.
- 2015-2017 Cadillac Escalade
- 2015-2017 Cadillac Escalade ESV
- 2016-2019 Cadillac ATS
- 2016-2019 Cadillac ATS-V
- 2016-2019 Cadillac CTS
- 2016-2019 Cadillac CT6
- 2016-2019 Cadillac CTS-V
- 2015-2019 Chevrolet Silverado
- 2017-2019 Chevrolet Colorado
- 2015-2019 Chevrolet Corvette
- 2016-2019 Chevrolet Camaro
- 2015-2019 GMC Sierra
- 2015-2019 GMC Yukon
- 2015-2019 GMC Yukon XL
- 2015-2017 GMC Yukon Denali
- 2015-2017 GMC Yukon Denali XL
- 2017-2019 GMC Canyon
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The class-action lawsuit claimed loss of residual value in owners' vehicles because of the defect. GM has recalled more than 2.6 million vehicles from the 2004 through 2014 model years.
According to the plaintiffs, GM 8L90 and 8L45 transmission problems have plagued their vehicles because dealerships have been unable to remedy. The automatic transmissions allegedly act up when drivers attempt to accelerate or decelerate.
'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. Said shudder, shake and hesitation also occurs while the subject vehicles are accelerating in a single gear, and not actively shifting gears.'
The plaintiffs say 8L90 and 8L45 transmissions can violently shift to the point drivers believe they were hit by other vehicles. The transmission problems allegedly occur within the transmissions or torque converters that cause friction on the surfaces and failures of the gears and hydraulic systems.
This allegedly causes metal shavings to circulate through the 8L90 and 8L45 transmissions, damaging the torque converters and transmissions.
According to the lawsuit, owners and lessees are stuck with repeated repairs that include flushing the transmissions of metal shavings, but in the end the vehicles still suffer multiple problems. The plaintiffs say they can't depend on their vehicles, something that if they would have known likely would have caused them to purchase different vehicles.
General Motors has allegedly known about the 8L90 and 8L45 transmission problems since 2015 when the automaker started issuing technical service bulletins (TSBs) and other bulletins to dealerships. The bulletins are meant to assist dealers if customers complain about issues with the transmissions by making repairs such as these:
- Complete the “clutch drive learn procedure”
- Replace the valve body
- Flush the cooler lines and cooler
- Flush the transmission
- Remove debris from and clean the transmission pan
- Replace the transmission filter
- Replace the transmission fluid
- Replace the entire transmission
According to the plaintiffs, none of the repairs have truly fixed the transmission problems and the automaker continues to conceal the alleged defects from customers.
Documents from the lawsuit reference numerous preliminary information (PI) and technical service bulletins sent to dealers beginning in October 2015 up to October 2018. The bulletins were sent because of problems with the 8-speed transmissions that shudder, jerk, lurch and have delayed responses, specifically GM 8L45 and 8L90 transmissions.
Starting in October 2015, GM issued PI bulletin PIP5337 entitled, “Shake or Shudder on Acceleration Excessive Engine RPM Fluctuation,” for vehicles equipped with 8L90 transmissions.
According to the PI, customers were complaining about:
“A shudder feeling that may be described as driving over rumble strips or rough pavement. These conditions may be caused by an internal torque converter issue. A revised torque converter that addresses these conditions will be available soon.”
The plaintiffs claim bulletin PIP5337 has been updated at least 10 times since it was issued.
In September 2014, GM issued TSB 14-07-30-001 entitled, “Information on Transmission Adaptive Functions,” this one concerning problems with 8L90 transmissions.
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“Some customers may comment on low mileage vehicles with automatic transmission that shift feel to be too firm (harsh) or may slip or flare. Customers should be advised that the transmission makes use of an adaptive function that will help to refine the shift feel while driving and improve shift quality.”
Then came TSB 16-NA-175 entitled “Shake and/or Shudder During Light Throttle Acceleration, Between 48 and 104 KM/H (30 and 65 MPH) at a Steady State,” which applied to vehicles equipped with 8L90 transmissions.
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In June 2016, GM issued PI bulletin PIP5405 with the subject line, “Surge Misfire Feeling Sensation During Highway Steady State Driving,” which was followed by TSB 16-NA-014 entitled, “Delayed Engagement After Sitting With Engine Off.”
In April 2017, GM issued PIE0405 entitled, “Engineering Information—Torque Converter Shudder,” a bulletin that was updated in September 2017.
In January 2019, GM issued TSB 18-NA-355 entitled, “Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed.”
According to the lawsuit, General Motors issued more than 12 additional bulletins related to 8-speed transmission problems. In addition, instead of sending dealers multiple bulletins, the plaintiffs say the automaker should have warned consumers about vehicles equipped with faulty transmissions.
Microsoft tapedrive driver download. The GM 8L90 and 8L45 transmission lawsuit was filed in the U.S. District Court for the Eastern District of Michigan, Southern Division - Francis, et al., v. General Motors, LLC.
The plaintiffs are represented by Pitt McGehee Palmer & Rivers, Cohen Milstein Sellers & Toll, and Gordon & Partners.
CarComplaints.com has owner-reported complaints about vehicles named in the GM lawsuit.
— A General Motors Vortec class action lawsuit alleges oil consumption problems plague the vehicles because of defective piston rings.
The GM Vortec class action lawsuit includes these vehicles equipped with Generation IV 5.3-Liter V8 Vortec 5300 LC9 engines.
- 2010-2014 Chevrolet Avalanche
- 2010-2014 Chevrolet Silverado
- 2010-2014 Chevrolet Suburban
- 2010-2014 Chevrolet Tahoe
- 2010-2014 GMC Sierra
- 2010-2014 GMC Yukon
- 2010-2014 GMC Yukon XL
The GM Generation IV Vortec 5300 engine was allegedly engineered to fail and consume excessive amounts of oil, primarily because the piston rings fail to keep oil in the crankcase.
The allegedly excessive oil consumption results in low oil levels, insufficient lubrication and internal engine damage that causes owners to expend huge amounts of money for repairs.
GM Vortec Class Action Lawsuit Claims Multiple Systems Cause Problems
However, the GM Vortec lawsuit alleges the piston rings aren't the only problem. The plaintiffs claim the active fuel management system also contributes to the alleged oil consumption problem.
According to the class action, the fuel management system uses an oil pressure relieve valve that sprays oil directly at the piston skirts, which allegedly overloads and fouls the piston rings. This allegedly causes oil to migrate past the piston rings where it either burns or accumulates as carbon buildup on the combustion chamber’s surfaces.
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The Vortec engine also allegedly includes a defective PCV system that 'vacuums atomized oil from the valvetrain into the intake system, where it is ultimately burned in the combustion chambers. This vacuuming process also contributes to excessive oil consumption.'
But the class action lawsuit alleges those aren't the only problems because the automaker uses a defective oil life monitoring system that doesn't monitor oil levels. The plaintiffs claim the systems fail to warn drivers of low oil levels until the levels are too low.
The oil life monitoring system only allegedly monitors engine conditions to provide a driver information about a vehicle needing a recommended oil change. According to the lawsuit, a driver can drive thousands of miles with low oil levels allegedly caused by the vehicle consuming excessive amounts of engine oil.
In addition to the oil life monitoring system, oil consumption is allegedly caused by an oil pressure gauge on the dash and an oil canister image that will illuminate when a vehicle is low on oil. However, the oil pressure gauge allegedly does not provide any indication as to when the oil pressure falls to levels low enough to damage the engines.
Customers claim migrating oil fouls the spark plugs no matter how many times drivers refill the oil, and those spark plugs then cause vehicles to run lousy, suffer misfires and finally shut down.
General Motors allegedly tells dealerships to perform repairs that help only for a short time, including a repair that includes instructions to decarbonize the rings and combustion chambers by using chemical abrasives.
The GM Vortec class action lawsuit alleges GM has known about oil consumption problems since 2007 model year vehicles were first sold.
The GM Vortec engine class action lawsuit was filed in the U.S. District Court for the Northern District of Ohio, Cleveland Division: Airko, Inc., et al., v. General Motors LLC.
The plaintiff is represented by DiCello Levitt Gutzler LLC, and Beasley, Allen, Crow, Methvin, Portis & Miles, P.C.