Crankcase (pcv) problems of the 2021 GMC Terrain

Vehicle information:year/make/model: 2021 GMC Terrainengine type: 1. 5l turbocharged enginecurrent mileage: 155,000 miles [1]description of safety defect:I am writing to report a severe, sudden engine and turbocharger failure on my 2021 GMC Terrain that presents an extreme, life-threatening safety hazard. While operating the vehicle in active traffic, the engine began flashing a severe dashboard warning reading "stop now danger" (accompanied by low oil pressure alerts) before suffering an immediate, catastrophic loss of all motive power. 2-this unexpected stalling leaves the driver completely stranded on active roadways without warning, drastically expanding the risk of a high-speed rear-end collision. A mechanic has inspected the vehicle and confirmed that both the engine assembly and the turbocharger require full replacement, with a repair estimate totaling $12,000. General motors is currently facing legal actions regarding defective, camshaft-driven mechanical vacuum pumps and pcv configurations on these 2018–2022 1. 5l engines defects known to fracture, send metal fragments violently into the engine top, and trigger immediate engine failure and turbocharger destruction. Despite these severe risks, GMC has refused to provide any goodwill assistance or repairs because the vehicle is outside warranty. I request that NHTSA immediately investigate the engine-destroying defects inherent to the 2018–2022 GMC Terrain line to protect consumers from catastrophic highway power failure.