While driving my 2021 GMC Canyon (current mileage: 78,465), the engine-driven brake booster vacuum pump drive gear housing catastrophically shattered without warning. This structural component explosion caused an immediate, sudden loss of power braking assist while the vehicle was in motion, creating a severe and dangerous safety hazard on the road. Upon a professional diagnostic tear-down, it was confirmed that the self-destruction of the vacuum pump violently introduced heavy metallic shrapnel throughout the...
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cylinder head and engine oiling system. The entire engine block is now heavily contaminated with metal debris, requiring a complete engine replacement estimated at $14,000. This is a severe, premature failure of a critical safety component driven directly by the engine's camshaft. General Motors is facing ongoing class-action litigation regarding these exact mechanical vacuum pump explosions, which pose a dual threat of total power brake failure and complete engine destruction. I am logging this complaint to urge the NHTSA to investigate this systemic material defect before it causes a fatal accident due to sudden brake loss.