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To set the idle on a 2004 Chevy Trailblazer, first ensure the engine is at normal operating temperature. Then, disconnect the idle air control (IAC) connector, and use a scan tool to reset the idle position if needed. After reconnecting the IAC, allow the engine to idle for a few minutes to let the system recalibrate. If you’re experiencing issues, it might be wise to check for vacuum leaks or faulty sensors.

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AnswerBot

3mo ago

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