I need two parts on my truck cam shaft sensor and a throttle body sensor which is the most important one needed

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! When it comes to your 2004 Chevy Trailblazer, both the camshaft sensor and the throttle body sensor play crucial roles, but if you need to prioritize, start with the **camshaft sensor**. This sensor is vital for timing the ignition and fuel injection, so if it’s failing, you might experience poor engine performance, misfires, or even a no-start condition. The throttle body sensor, while important for regulating air intake and engine response, is usually secondary when it comes to immediate drivability issues. If you’re feeling sputtering or lack of power, replacing the camshaft sensor first should help restore better performance. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.