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Home >> Chevrolet >> 2009 >> HHR LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Description and Operation >> Data Link Communications Description and Operation >> Class 2 Serial Data Usage
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Class 2 Serial Data Usage

The class 2 serial data communications circuit on this vehicle is only used for powertrain control module (PCM) diagnostics and PCM service programming system (SPS) programming.

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