NHTSA Complaint #11707136 — 2017 CHEVROLET BOLT EV

I am reporting a safety issue involving the high-voltage battery system of my vehicle. Vehicle: 2017 Chevrolet Bolt EV VIN: [XXX] Mileage: 87,125 miles The vehicle has generated a P302F diagnostic trouble code, which indicates high-voltage battery cell imbalance. This condition may pose a safety risk related to battery performance and thermal stability. The authorized Chevrolet dealership has refused to diagnose the issue under warranty unless I pre-authorize a $600 diagnostic fee. The vehicle is covered under an active GM buyback warranty and a 10-year / 100,000-mile battery warranty due to a recall battery replacement. Due to the safety implications of a high-voltage battery fault, I believe refusal to diagnose the issue under warranty may pose a risk and warrants review. I am submitting this complaint to document the issue and request investigation. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)