2025 Buick Encore Gx

Second complete powertrain failure on March 14, 2026 at 13,993 miles, nine days after first repair (complete transmission replacement for bone-dry sealed transmission). Symptoms: sudden loss of power on highway (unable to exceed 20 mph with accelerator fully depressed), hollow sound, noise described as "like a rock tumbling around inside." OnStar diagnostics returned "No Error Code Found" twice (11:14 AM and 11:17 AM) during active failure. Dealer (Loveland Buick GMC) diagnosed "battery issue" but provided indefinite loaner with no return date. Symptoms are consistent with engine bearing or connecting rod failure matching Cook et al. v. General Motors (Case No. 1:26-cv-00229, D. Del., filed March 4, 2026) covering 1.2L/1.3L turbo engines in the Buick Encore platform. Complaint alleges GM knew about defect "since 2022, if not earlier" and instructed dealers to tell consumers vehicles are "operating normally." First failure involved sealed transmission running with zero fluid. Skipped oil change after transmission repair (documented in GM Executive Resolution emails) may have allowed metal contamination to damage engine components. Requesting investigation into whether dealer's "battery" diagnosis was accurate or whether actual diagnostic codes indicate engine failure consistent with Cook v. GM class pattern.