Throttle Body 12568580 for Chevrolet TrailBlazer LS, Chevrolet Colorado LT Pickup Trucks and SUVs (2004–2006)Product Overview Part Name: Throttle Body Assembly Part Number: 12568580 Vehicle Compatibility: Chevrolet TrailBlazer LS SUVs and Chevrolet Colorado LT pickup trucks equipped with gasoline engines and electronic throttle control systems (20042006). Configuration: OEM style electronic throttle body designed to GM airflow and sensor specifications. Function: Regulates intake airflow to ensure smooth acceleration, stable idle, and proper fuelair mixture