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GMC
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2003
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Envoy 4WD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - Self-Diagnostics - 4.2L
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Diagnostic Tests
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DTC P1516: Commanded Vs. Actual Throttle Position Performance (TAC Module)
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Conditions For Running DTC
Conditions For Running DTC
Ignition is ON.
Ignition voltage is greater than 8 volts.
System is not in the battery save mode.
Engine is running.
DTC P1514 is not set.