How to Troubleshoot a Chevy Trailblazer 1Determine the location of the OBD2 diagnostic port within your Trailblazer by referencing the owner's manual or by feeling about the region below the steering wheel, near the top of your driver's side foot properly.
The diagnostic port will be around 2 inches wide.2Plug the diagnostic code scanner into the diagnostic port.3Turn your Trailblazer's ignition to the accessories position car diagnostic software, if your engine is not going to get started, or turn it on each of the way if your engine will start out, so that the electronics are turned on and also the engine is idling if probable.
4Allow the code scanning tool to execute a code scan and take note of any error codes which might be displayed on the code scanning tool.5Bring your error codes to a Chevy dealership, auto parts store, mechanic, or execute a internet search auto diagnostic software, to discover what the error codes represent. By finding out what certain elements are broken, you'll be able to save time diagnosing the troubles and begin the repair approach sooner.
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