Steven Cohen  |  March 6, 2020

Category: Auto News

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GM knowingly sold Corvette vehicles with defective engines, according to a recent class action lawsuit against the automotive company.

The class action lawsuit was filed against GM by individuals from numerous states who leased or purchased a 2013 Chevrolet Corvette 427 or 2006-2013 Chevrolet Corvette Z06 vehicles equipped with an LS7 engine.

The plaintiffs say that the engines in these vehicles suffer from excessive valve guide wear, a problem known by General Motors.

The GM engine class action lawsuit states that, due to the defects in the manufacturing of the LS7 7.0LV8 engines, the Class vehicles are prone to frequent mechanical failure. The defect causes oil to suddenly leak under the vehicle which can cause the rear tires to lose traction, according to the General Motors class action lawsuit.

The plaintiffs state that the engines present a “dire and significant safety danger” to the vehicle operator which could result in life-threatening bodily harm. Many of the plaintiffs maintain that this failure has occurred in their vehicles.

The GM class action claims that “Upon failure, the subject engines are subject to explosion, resulting in the ejection of engine fragments and other materials that can strike the driver of the subject vehicle, or other vehicles or drivers in the vicinity.”

Because of the design defect of the engines that are installed in the Class vehicles, the owners and lessees of these vehicles have suffered economic expense for repairs on the cars, according to the Corvette class action lawsuit.

The plaintiffs argue that GM has not issued a recall so that the Class vehicles could be tested and repaired. In addition, they assert that GM has recalled the Corvettes at issue for two other, less serious defects.

The General Motors class action lawsuit argues that, even when confronted by the engine defects, the company insists that the “valve train noise” was an “inherent feature” of the engines and that they are not defective.

GM has assured the Class Members that the engines were performing as designed; however the engines continue to fail at a high rate, the plaintiffs claim.

The class action maintains that, as a result of consumer complaints about the engine, GM put into place a technique called the “wiggle method” to ascertain whether the valve guides were out of specification. However, once GM realized that this test would lead to more repairs than it wanted to perform, the “wiggle test” was unreasonably rejected, the plaintiffs state.

“In dealing with multiple complaints concerning the subject engine in the class vehicles, New GM acted, at all times, to deflect criticisms, defer investigations and repairs, and minimize the extent of the problems,” alleges the GM class action lawsuit.

The plaintiffs claim that Class Members have continued to suffer from valve train noise, out of specification valve guides and engine failures all the while GM has minimized the extent of the defect in the vehicle engines.

A similar lawsuit was filed against GM in November 2017 by vehicle owners who allege that the Corvette Z06 cars have defects that make them unsafe to drive.

Do you own a Corvette with a defective engine? Leave a message in the comments section below.

The plaintiffs are represented by David M. Honigman, Douglas L. Toering, and Kenneth Chadwell of Mantese Honigman, PC and André E. Jardini, K.L. Myles, and Michael D. Carr of Knapp Petersen & Clarke.

The General Motors Engine Defect Class Action Lawsuit is Estate of William D. Pilgrim, et al. v. General Motors LLC, et al., Case No. 2:20-cv-10562, in the U.S. District Court for the Eastern District of Michigan.

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125 thoughts onGM Class Action Says Corvette Engine Is Defective

  1. Hailey Schiller says:

    2008 Z06 with 32,000 miles and the motor was making noise, shavings were found during oil change, had new rockers put on, because that’s where the shavings came from, engine still made noise but ran fine for a lil while then one day a loud clanking noise and parts rattling around in engine, and then it locked up. Stranded on the side of the road. Not a good day. It’s been sitting now for weeks. Something must be done about this!

  2. Dave Taylor says:

    07 z06. 65k on issues yet. Please add to list

  3. Glenn Bland Sr says:

    ADD ME TO THIS LIST I still have original heads in my possession. 2015 Camaro Z/28 LS7. Just replaced both heads with a set of Reworked GM heads New MS90 guides and Ti intakes SS exhaust . Disassembled 1 head ALL intake guides were out of spec All exhaust were ok. 21k Hwy and city miles. No track . All intake valves inspected and mic’d All were in spec leading to the guides being the issue. Powdered metal GM used was of poor quality and in my opinion too short for proper support for the 1:8 RR

  4. Sean Hayter says:

    Can C6 Z06 owners from Australia be a part of this ?

  5. Lee says:

    2006 Z06 completely stock has excessive valve noise, taking it in to be tested shortly. 31K miles, otherwise in absolutely showroom condition

  6. jason stiles says:

    2007 Corvette z06 owner, no issues yet.

  7. Scott McLean says:

    2013 427 Convertable had motor replaced by GM at 4000km valve noise. Just went back in shop same noise at 40000km GM says it’s out of warranty and wants 10k Canadian for new heads.

  8. Michael Osborne says:

    2009 Z06 Unknown if the heads have been replaced. 7,700 mile on the odometer. Purchased on 5/2021 from Mark Wahlberg Chevrolet, Columbus, Ohio

  9. Cody says:

    Add me to the list had a 2008 Z06 transferred in. Turned out to have a flashing engine light and head issues. All stock at 69k miles.

    1. John A. says:

      Add me to the list.(Noisy)
      2007 Z06 25K (Mint Museum Piece) No Rain- Under cover- Garaged-Weekend only!

  10. Kenneth says:

    08 z06 owner add me to the list as well..No issues as of yet

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