Operation CHARM
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Chevy Truck
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1999
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K 1500 Truck 4WD V8-6.5L DSL Turbo VIN S
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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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Description and Operation
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Information Sensors/Switches
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A/C Signal
A/C Signal
This signal indicates that the A/C compressor clutch is engaged. The
PCM
uses this signal to adjust the
idle speed
.