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Home >> Chevrolet >> 2020 >> Impala LT >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications >> 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 Scan Tool Does Not Communicate with Low Speed GMLAN Device  or Diagnostic Trouble Code (DTC) List - Vehicle

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