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Home >> GMC >> 2011 >> Sierra 2500 HD, 4D Pickup, 6.0 G, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications 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 (with HP2) or DTC U0100-U02FF (without HP2) .

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