Operation CHARM
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GMC Truck
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1987
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S15/T15 4WD P/U L4-151 2.5L
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Scan Tool Testing and Procedures
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Positions
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Throttle Angle
Throttle Angle
Indicates throttle position as percent. Reading should be low at idle and 100 percent at wide open throttle.