024 GMC Sierra 2500 Denali Ultimate, which has suffered: ¢Five catastrophic engine failures at highway speeds. ¢Total brake failure, leaving the truck unable to stop. ¢Severe electrical malfunctions, including flickering headlights at night. ¢Retaliatory actions from General Motors after I refused to waive my legal rights. I have documented proof, including GMs own service records, emails, and a 7-minute recorded statement from GMs highest-level technician, confirming that GM installed the wrong computer module (1500 series instead of the required 2500 series) in my truck. Additionally, I have evidence that GM executives instructed technicians to conduct diagnostics, take apart the engine, and reassemble it’but NOT repair the defect’after I refused to sign an affidavit waiving my rights. Due to these failures, I suffered a dislocated shoulder in one of the incidents, and my [XXX] daughter remains traumatized to this day. Given the immediate danger this defect poses to other GMC Sierra 2500 owners, I respectfully request that NHTSA open an investigation and consider issuing a recall before a tragedy occurs. 1. Engine Failures Since 3,000 Miles ‘ GMs Own Work Orders Confirm Issue Since purchasing my 2024 GMC Sierra 2500 Denali Ultimate, I have experienced five catastrophic engine failures, all occurring while traveling at highway speeds (70 mph): ¢The truck suddenly lost power, dropping from 70 mph to 5-10 mph within seconds. ¢This created an immediate risk of being rear-ended or losing control on the highway. ¢GMs own service records confirm that my engine issues began at just 3,000 miles. ¢GM dealerships misdiagnosed the issue FOUR TIMES, returning my truck to me in an unsafe condition. ¢The real cause was only identified after the FIFTH failure, when a GM-certified head technician finally determined that GM had installed the wrong computer module (1500 series instead of 2500 series). This means that for months, GM knew my vehicle w INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA