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Why would the check engine light come on a Trail blazer?

The check engine light on a Trailblazer can come on for a variety of reasons, including:

* A loose or damaged gas cap.

* A faulty oxygen sensor.

* A problem with the catalytic converter.

* A problem with the ignition system.

* A transmission problem.

* A problem with the emissions system.

If the check engine light is on, it is important to have the vehicle diagnosed by a qualified mechanic as soon as possible to identify the cause and determine the appropriate repairs.

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