Eric Barron, Chelsey Thompson, Simon Moeller, on behalf of themselves and all others similarly situated v. General Motors LLC

CourtDistrict Court, E.D. Pennsylvania
DecidedMay 18, 2026
Docket2:25-cv-05696
StatusUnknown

This text of Eric Barron, Chelsey Thompson, Simon Moeller, on behalf of themselves and all others similarly situated v. General Motors LLC (Eric Barron, Chelsey Thompson, Simon Moeller, on behalf of themselves and all others similarly situated v. General Motors LLC) is published on Counsel Stack Legal Research, covering District Court, E.D. Pennsylvania primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Eric Barron, Chelsey Thompson, Simon Moeller, on behalf of themselves and all others similarly situated v. General Motors LLC, (E.D. Pa. 2026).

Opinion

IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF PENNSYLVANIA

ERIC BARRON, CHELSEY : CIVIL ACTION THOMPSON, SIMON MOELLER, on : behalf of themselves and all others : similarly situated : : v. : NO. 25-5696 : GENERAL MOTORS LLC :

MEMORANDUM

MURPHY, J. May 18, 2026 This is a car defect case. Eric Barron, Chelsey Thompson, and Simon Moeller each bought new vehicles manufactured by General Motors. Within weeks, their brakes failed, and their cars were in the shop for weeks. Now, the three purchasers sue on behalf of similarly situated individuals, alleging that GM knew, said nothing, and kept selling defective cars at full price. GM says we should take an exit ramp — arguing that Mr. Barron and Ms. Thompson are bound to arbitrate their claims — or shift into reverse because plaintiffs somehow managed to insufficiently plead all 13 counts of the complaint. We kicked the tires on GM’s motion, but see no reason to deviate. GM cannot benefit from arbitration agreements between the plaintiffs and the car dealers, and the complaint is entirely adequate. We give plaintiffs’ claims the green light to proceed to discovery. I. Factual Background

In April of 2025, Eric Barron and Chelsey Thompson entered separate car dealerships and each left with a new 2025 Chevrolet Traverse. DI 25 at ¶¶ 52, 65. Mr. Barron purchased his Traverse from Reedman Toll Chevrolet in Springfield, Pennsylvania. Id. at ¶ 52. Ms. Thompson bought hers at West Herr Chevrolet of Rochester in Rochester, New York. Id. at ¶ 65. The dealerships assured Mr. Barron and Ms. Thompson that their vehicles were accompanied by a new vehicle limited warranty. Id. at ¶¶ 53, 66. But within weeks of purchasing their respective vehicles, Mr. Barron and Ms. Thompson both experienced a “Master Brake Defect” — where the master brake cylinder assemblies fail abruptly, leading to the partial

or total loss of the ability to engage the vehicles’ brake systems. Id. at ¶¶ 1, 55, 68. In both instances, the defect’s occurrence was preceded by the illumination of warning lights on the cars’ dashboards. Id. at ¶¶ 56, 69. When the master brakes failed on their vehicles, Mr. Barron and Ms. Thompson were in transit; they immediately took the vehicles to their respective dealerships, which confirmed the master brake system had failed. Id. at ¶¶ 56-60; 69-74. Mr. Barron’s vehicle was out of service for 29 days, id. at ¶ 62, and Ms. Thompson’s vehicle was out of service for 31 days. Id. at ¶ 80. Simon Moeller had a similar experience. In March of 2025, Mr. Moeller bought a new 2025 GMC Acadia from Oakes Buick GMC in Kansas City, Missouri. Id. at ¶ 83. He received assurances from Oakes Buick that the Acadia came with a new vehicle limited warranty, but was

not informed of the existence of the vehicle’s defective master brake system. Id. at ¶¶ 84. In July of 2025, Mr. Moeller was driving his Acadia on a highway when the brakes malfunctioned, requiring excessive force with reduced braking capabilities, and warning lights in his vehicle came on. Id. at ¶ 86. Oakes Buick inspected and repaired the defective brakes. Id. at ¶¶ 87-88. His car was out of commission for 27 days. Id. at ¶ 89. Mr. Barron, Ms. Thompson, and Mr. Moeller say that their experiences are part of a larger pattern, and not just among the 2025 Chevrolet Traverse: the 2025 GMC Acadia, 2025 Buick Enclave, 2025 Chevrolet Colorado, and 2025 GMC Canyon — what the complaint calls

2 the “class vehicles” — all allegedly contain master brake cylinder assembly defects. Id. at ¶ 1. As with the named plaintiffs, when the defect occurs, the vehicle displays “numerous warning lights,” including the red “Brake” light, the anti-lock brake system light, and a message which says “service brake system.” Id. at ¶ 2. When the brake system fails, drivers experience a loss of

the ability to brake, and the peddle either becomes “stiff and hard to press,” or sinks to the floor. Id. The latent defect is present at the time of sale, but does not manifest until weeks or months after. Id. at ¶ 18. The manufacturer and designer of the vehicles, General Motors LLC (GM), allegedly knew that the class vehicles had defective master brake systems before selling the vehicles. Id. at ¶¶ 5, 12, 21. For example, the 2024 Chevrolet Traverse had a similar master brake defect for which GM issued a service update.1 Id. at ¶¶ 5, 21. GM knew about the defect in the 2024 Traverse months before its service update as a result of testing, complaints by owners, and “reports from the field.” Id. at ¶¶ 6, 24, 27. The service update was the result of significant time spent developing a proposed repair of the defect, and directed dealerships to inspect and (if

necessary) replace the master bake cylinder. Id. at ¶ 24. For the 2025 class vehicles, GM has issued a service update only for the 2025 Buick Enclave, but has not otherwise issued a service update for the other class vehicles, and did not issue any bulletin to its dealers about the defect or otherwise make a safety recall. Id. at ¶¶ 4, 28. Despite its knowledge of the vehicles’ defective master brake systems, GM installed

1 According to the complaint, GM became aware of the defect in the class vehicles “through other sources not available to Plaintiffs and Class Members,” such as pre-production testing, design failure mode and analysis early consumer complaints, both exclusively to GM’s network of dealers and directly to GM, aggregate warranty data from dealers, testing in response to complaints, and repair order and parts data from dealers. DI 1 at ¶¶ 37-42. 3 “substantially similar” master brake cylinder assemblies in the class vehicles and marketed them as “safe, reliable, and suitable for everyday use,” concealing their defective condition. Id. at ¶ 26. For each of the class vehicles, GM provided a 3-year or 36,000 mile new vehicle limited warranty, provided through its dealerships at the time of purchase, which states that “[t]he

warranty covers repairs to correct any vehicle defect related to materials or workmanship occurring during the warranty period[.]” Id. at ¶¶ 29-32 (citation modified). GM controls the execution of the warranty repairs by providing training, materials, tools, software, and compensation to its dealerships, such that the dealerships are GM’s “agents for purposes of vehicle repairs[.]” Id. at ¶ 34-46. Plaintiffs provide over 70 examples of complaints related to the class vehicles that were submitted to the National Highway Traffic Safety Administration or otherwise posted online. Id. at ¶¶ 47-51. II. The pending motions Mr. Barron, Ms. Thompson, and Mr. Moeller sue on behalf of a putative class of individuals who purchased one of the class vehicles in New York, Pennsylvania or Missouri

and bring thirteen counts: (1) fraudulent concealment; (2) unjust enrichment; (3) violation of the Pennsylvania Lemon Law; (4) breach of express warranty under Pennsylvania law; (5) breach of implied warranty of merchantability under Pennsylvania law; (6) violation of the Pennsylvania Unfair Trade Practices and Consumer Protection Law (UTPCPL); (7) violation of New York Lemon Law; (8) breach of express warranty under New York Law; and (9) violation of the New York General Business Law; (10) violation of the Missouri Lemon Law; (11) breach of express warranty under Missouri law; (12) breach of implied warranty of merchantability under Missouri law; and (13) violation of Missouri Merchandising Practices Act (MMPA). Id. at ¶¶ 91-236.

4 GM pursues two avenues of dismissal. First, GM moves to compel Mr. Barron and Ms. Thompson into arbitration, arguing that because they entered into arbitration agreements with their respective dealerships, GM is entitled to enforce those arbitration agreements as a non- signatory. DI 16. Second, GM moves to dismiss the first amended complaint in its entirety for

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Eric Barron, Chelsey Thompson, Simon Moeller, on behalf of themselves and all others similarly situated v. General Motors LLC, Counsel Stack Legal Research, https://law.counselstack.com/opinion/eric-barron-chelsey-thompson-simon-moeller-on-behalf-of-themselves-and-paed-2026.