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GMC
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1989
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Jimmy 6.2 C
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Repair and Diagnosis
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Engine Performance
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System
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6.2L CEC Testing
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Diagnosis & Testing
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Code 23 - Throttle Position Sensor MISADJUSTED
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Diagnostic Aids
Diagnostic Aids
Disregard Code 23 if "SERVICE ENGINE SOON" light goes out as soon as throttle is returned to idle.