Affected components: engine control module (ECM). Affected vehicles: 2021 Chevy Trailblazer 2022 Chevy Trailblazer 2023 Chevy Trailblazer ...

Oh, and by the way, select emissions-related components (think cats and the engine control module) are covered for 80,000 miles or eight years.

While a "harmonic balancer" sounds like some form of auto-tune, it's actually a necessary component for your car. What happens if it goes bad?