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GMC Truck
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1993
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K 3500 Truck 4WD V8-454 7.4L
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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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Relays and Modules - Computers and Control Systems
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Idle/Throttle Speed Control Unit
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Adjustments
Idle/Throttle Speed Control Unit: Adjustments
Base Idle Speed is not adjustable on this engine and is controlled by the control module.
Refer to FUEL SUPPLY AND AIR INDUCTION/ADJUSTMENT PROCEDURES for adjusting Controlled Idle Speed.