Case Overview: A class action lawsuit alleges General Motors sold Chevrolet Silverado and GMC Sierra trucks equipped with rear sliding windows that are prone to water intrusion due to an alleged manufacturing or design defect.

Consumers Affected: Owners and purchasers of affected Chevrolet Silverado and GMC Sierra trucks with rear sliding windows

Court: Not yet confirmed

GM Faces Class Action Over Alleged Water Intrusion Defect in Chevrolet Silverado and GMC Sierra Trucks

A new class action lawsuit alleges General Motors knowingly sold Chevrolet Silverado and GMC Sierra pickup trucks with defective rear sliding windows that allow water to leak into the vehicle cabin. According to the complaint, the alleged defect exposes owners to interior damage and ongoing repair costs — problems the lawsuit claims GM failed to adequately disclose at the point of sale.

According to reporting by Top Class Actions, the lawsuit targets one of the most popular truck lineups in the United States, raising questions about how the alleged defect was handled before and after sale.

Rear Sliding Windows Allegedly Allow Water Inside the Cab

At the center of the lawsuit is the rear sliding window — a standard feature on many Silverado and Sierra configurations. The complaint alleges the windows are prone to water intrusion, meaning water can seep past the window assembly and enter the truck's interior during rain or other wet conditions.

The lawsuit alleges this is not an isolated manufacturing error affecting a handful of trucks, but rather a systemic defect present across a broader population of vehicles. According to the complaint, GM was aware, or should have been aware, of the issue and failed to adequately warn consumers before purchase.

Trucks at Issue Include Popular Silverado and Sierra Models

The Chevrolet Silverado and GMC Sierra are among the top-selling full-size pickup trucks in the United States, with millions of units on the road. The lawsuit alleges that affected vehicles include trucks equipped with the rear sliding window option — a feature marketed as a functional convenience for cab ventilation and pass-through access.

The specific model years covered by the proposed class have not been confirmed in available reporting, but the suit appears to target a range of vehicles sold with this window configuration. Consumers who purchased these trucks may have done so without knowledge of the alleged defect, the lawsuit claims.

Alleged Defect Creates Interior Damage and Out-of-Pocket Costs

Beyond the inconvenience of a leaking window, the lawsuit alleges the water intrusion defect can lead to meaningful financial harm for truck owners. Water entering the cab can damage interior components — including upholstery, flooring, electronics, and other materials — potentially resulting in costly repairs.

The complaint argues that consumers paid a premium for trucks they believed to be free of known defects, and that had they been informed of the alleged water intrusion issue, they would have paid less or chosen a different vehicle altogether. This type of claim — rooted in the economic harm of overpaying for a defective product — is common in class action litigation involving consumer goods.

What GM Has Said

As of this writing, no public response from General Motors addressing the specific allegations in this lawsuit has been reported. Defendants in class action cases typically deny the allegations and contest class certification. This article will be updated if GM issues a statement.

A Pattern of Truck Defect Litigation

Lawsuits targeting alleged defects in full-size pickup trucks have become increasingly common in recent years, with plaintiffs targeting manufacturers over issues ranging from transmission problems and brake failures to rust and water leaks. High-profile brands and high-volume sales make pickup trucks frequent subjects of class action litigation, particularly when an alleged defect affects a widely selected option or trim feature.

The rear sliding window is a popular add-on across the Silverado and Sierra lineups, meaning the potential class of affected consumers could be substantial if the case proceeds and a class is certified.

Related Cases

• Ford Faces Class Action Over Alleged Water Leak Defect in F-150 Trucks
• Chevy Silverado Owners Sue Over Alleged Transmission Defect
• GMC Sierra Lawsuit Targets Alleged Brake System Issues

Lawsuit: To be confirmed upon full complaint review

Case Number: Not yet publicly confirmed

Court: Not yet confirmed

Plaintiffs' Attorney(s): Not yet confirmed

Have you owned a Chevrolet Silverado or GMC Sierra with a rear sliding window and experienced water leaking into the cab? Share your experience in the comments below.