Table 1 shows one common service brakes related problems of the 2026 Buick Enclave.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
The contact owns a 2026 Buick Enclave. The contact stated that while driving at approximately 20-60 mph, there was an abnormal squealing sound coming from the vehicle. The dealer was contacted and determined that the brakes were inoperable. The customer service representative was contacted and opened a case; however, the case was denied. The approximate failure mileage was 5.
I am reporting a sudden, complete failure of the vehicle braking system. I was operating a black 2026 Buick Enclave (an enterprise rental car which my husband, [xxx], rented from the tucson International airport fleet, vehicle fleet #xxx) with my two children in the backseat. We were traveling at the posted speed limit of 45 mph in the fast lane on [xxx], heading toward costco. Without warning, the braking system completely malfunctioned. Half a dozen red warning lights illuminated and alarmed on the dashboard, including the primary "brake" indicator. When I pressed the brake pedal, it completely stopped working and went dead. The electronic parking brake failed to engage as well. Fortunately, the vehicle immediately ahead of me cleared a green light at the intersection, allowing me to coast through before the light turned red. I safely steered across the slow lane onto the shoulder and pressed "park," but the vehicle continued to roll. The vehicle only came to a complete stop when I turned the engine ignition completely off. This vehicle has an iowa license plate (pyr149) and failed at around 28,128 miles. This matches the exact profile of the ongoing master brake cylinder cartridge seal failures documented in active federal litigation against general motors (such as xxx v. General motors llc). This defect poses an immediate public safety risk across gm's 2025-2026 shared-platform vehicles (enclave, traverse, acadia, colorado, canyon) and needs to be formally investigated for a 2026 fleet safety recall. I have contacted gm corporate (case number xxx) and william withington at enterprise corporate regarding this incident. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).