GM Class Action, Drivers Claim Popular SUVs Have Dangerous Brake Failures

On February 18, 2026, a federal class action lawsuit was filed against General Motors LLC in the Eastern District of Michigan. The complaint alleges that certain Chevrolet Equinox, GMC Terrain, and Buick Envision models contain a defective brake vacuum pump that causes sudden loss of braking power and hard brake pedals. The case is currently in the early litigation phase with no settlement reached.

Quick Facts Table

Field	Detail
Case Name	Thieme, et al. v. General Motors LLC
Court	U.S. District Court for the Eastern District of Michigan
Date Filed	February 18, 2026
Defendant	General Motors LLC
Lead Plaintiff	Kaylee Thieme, Rebecca Gill, and Meghan Morley
Alleged Violation	Breach of Warranty, Unjust Enrichment, Fraudulent Concealment
Products Affected	2018–2022 Chevrolet Equinox, 2018–2022 GMC Terrain, 2016–2020 Buick Envision
Geographic Scope	Nationwide (U.S.)
Settlement	None — litigation phase only
Claim Form Available	No
Plaintiffs’ Attorneys	The Miller Law Firm P.C. and Clarkson Law Firm P.C.

What Actually Happened?

General Motors is one of the world’s largest automakers, selling millions of compact SUVs that consumers rely on for family transportation and daily commuting. The lawsuit centers on the mechanical brake vacuum pump, a component that provides the “power assist” needed to stop a multi-ton vehicle with reasonable pedal force. In the affected vehicles, this pump is driven by the engine’s camshaft to create a vacuum for the brake booster.

The legal action was triggered after numerous owners reported that their brake pedals suddenly became “hard as a rock” while driving, significantly increasing the distance needed to stop. According to the complaint, lead plaintiffs experienced terrifying incidents where brakes failed on highways, in some cases requiring drivers to steer off the road or cut the ignition to stop. The lawsuit alleges that GM was aware of these issues for years but failed to issue a recall similar to the one it launched for full-size trucks in 2019.

What Does the Lawsuit Allege?

The lawsuit alleges that the brake vacuum pump in these SUVs suffers from a design defect that causes it to lose pressure during normal operation. As the pump attempts to compensate for this loss, it allegedly undergoes accelerated internal wear, eventually seizing or shattering entirely. According to the complaint, when the pump fails, drivers are left with manual brakes that require extreme physical force to depress, creating a high risk of collisions.

Furthermore, the complaint alleges a secondary “catastrophic” consequence of the pump failure. Plaintiffs claim that when the internal components of the vacuum pump fracture, metal shards and debris can be pumped directly into the vehicle’s engine. This allegedly causes severe damage to the camshaft, timing system, and valve cover gaskets, resulting in repair bills that can exceed $5,000. The lawsuit claims GM has routinely refused to cover these repairs under warranty, characterizing the failure as a maintenance issue or “software anomaly.”

What Laws Were Allegedly Violated?

• Federal Warranty Law (Magnuson-Moss Warranty Act): The lawsuit claims GM failed to honor its written warranties by refusing to fix a known mechanical defect.
• Michigan Consumer Protection Act: Alleging that GM engaged in unfair or deceptive trade practices by selling vehicles it knew were unsafe.
• Fraudulent Concealment: The complaint argues GM actively hid its knowledge of the defect from consumers to maintain high resale values and avoid repair costs.
• Unjust Enrichment: This claim seeks to recover profits GM allegedly gained by selling defective vehicles at premium prices.

Who Does This Lawsuit Affect?

• You may be affected if you purchased or leased a 2018–2022 Chevrolet Equinox.
• You may be affected if you purchased or leased a 2018–2022 GMC Terrain.
• You may be affected if you purchased or leased a 2016–2020 Buick Envision.
• You may be affected if you experienced a “Service Brake Assist” message or a stiff brake pedal in one of these models.

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No action is required right now. Save any purchase records, repair invoices, diagnostic reports, or tow bills related to brake or vacuum pump issues — these may matter if a settlement is reached. If you still have failed parts, such as a shattered pump housing, consider keeping them as evidence.

What Is the Company Saying?

General Motors LLC has not issued a public statement specifically addressing the Thieme lawsuit as of March 23, 2026. In previous technical service bulletins (TSBs) and communications to dealers, GM has often attributed brake assist warnings to software issues rather than a mechanical design flaw. The company has historically defended its safety record by pointing to rigorous testing and its cooperation with the National Highway Traffic Safety Administration (NHTSA). AllAboutLawyer.com will update this article when a formal legal response or motion to dismiss is filed in court.

What Happens Next?

• Defendant’s Response: GM is expected to file a motion to dismiss or a formal answer to the complaint by the end of spring 2026.
• Discovery Phase: If the case survives dismissal, attorneys will begin “discovery,” which involves subpoenaing GM’s internal emails and testing data regarding the vacuum pump.
• Class Certification: The court will hold a hearing to decide if the case can proceed as a nationwide class action.
• Litigation Roadmap: Because this case involves complex engineering claims, it could take 18 to 36 months to reach a trial or a settlement agreement.

This page will be updated as the case develops.

Important Case Dates

Milestone	Date
Lawsuit Filed	February 18, 2026
Defendant Answer Due	TBD
Discovery Period	TBD
Class Certification Hearing	TBD
Trial Date (if set)	TBD
Settlement (if reached)	TBD

Frequently Asked Questions

Is the General Motors lawsuit real/legitimate?

Yes. The lawsuit was officially filed in the Eastern District of Michigan under case number 2:26-cv-10570. It is an active federal legal proceeding led by established class action law firms.

Can I file a claim against General Motors right now?

No. There is no settlement fund or claim form currently available. You do not need to take any legal action to be included in the proposed class, as the attorneys are currently litigating on behalf of all affected owners.

Do I need a lawyer to join this lawsuit?

No. In a class action, the “class counsel” (The Miller Law Firm and Clarkson Law Firm) represents the interests of all members. You only need your own lawyer if you intend to file an individual lawsuit for personal injuries.

What happens if the case settles?

If a settlement is reached, GM would likely establish a fund to reimburse owners for past repair costs. A settlement might also include extended warranties for the vacuum pump or a voucher toward the purchase of a new vehicle.

Will I get notified if there is a settlement?

Yes. If a settlement is preliminarily approved by a judge, GM will be required to send notices via mail or email to all registered owners of the affected vehicle identification numbers (VINs).

Should I stop driving my Equinox or Terrain?

The lawsuit alleges the defect is a safety hazard, but no official recall has been issued by the NHTSA. If you notice a “Service Brake Assist” light or a stiff brake pedal, you should have the vehicle inspected by a mechanic immediately.

Can I get reimbursed for a repair I already paid for?

If a settlement is eventually reached, it usually includes a “reimbursement” component. This is why it is critical to keep all receipts showing you paid out of pocket for a vacuum pump or engine repair.

Last Updated: March 23, 2026

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Legal claims and outcomes depend on specific facts and applicable law. For advice regarding a particular situation, consult a qualified attorney.