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Home >> Buick >> 2012 >> Regal GS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Data Communications System >> Diagnostic Information and Procedures >> DTC U0020 >> Circuit/System Verification
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Circuit/System Verification

Diagnosis of this DTC is accomplished via the symptom or an additional DTC, Refer to Symptoms - Data Communications , DTC U0100-U02FF (without HP6) , DTC U0100-U02FF (with HP6) .

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