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Home >> Chevrolet >> 2017 >> Spark ACTIV, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U007B: Control Module Communication High Speed Extension CAN Bus Off >> Diagnostic Fault Information
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Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Gateway Expansion High Speed GMLAN Serial Data (+)
or High Speed GMLAN Serial Data (+) (8)		 U007B U007B U007B -
Gateway Expansion High Speed GMLAN Serial Data (-)
or High Speed GMLAN Serial Data (-) (8)		 U007B U007B U007B -
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