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Home >> GMC >> 2013 >> Sierra 1500 XFE >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U0020 >> Circuit/System Verification

Circuit/System Verification

Diagnosis of this DTC is accomplished via the symptom, DTC U0100-U02FF (without HP2 and U029D-U029E) , DTC U0100-U02FF (with HP2) , DTC U0100-U02FF (U029D and U029E only) .

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