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Avalanche 2500, 4WD
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Engine Controls - Self Diagnostics - 8.1L
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Diagnostic Tests
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DTC P1518: Throttle Actuator Control Module Serial Data Fault
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Conditions For Setting DTC
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Conditions For Setting DTC
Invalid or missing serial data messages are detected for a predetermined amount of time.
All of the above conditions met for more than 1 second.