Tahoe 2WD V8-4.8L VIN V (2004)
Suspension Control ( Automatic - Electronic ): Description and Operation
Automatic Level Control
Automatic Level Control Description and Operation
The RTD system is bi-state real time damping system. The Suspension Control module controls the suspension damper solenoids and suspension
position sensors, along with parts of the automatic level control (ALC) system and electronic variable orifice (EVO) power steering system. The
Automatic Level Control system consists of the following:
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Suspension Control Module
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Compressor/Leveling Module
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Air Pressure Sensor
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Exhaust Solenoid
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Compressor Motor Relay
The objective of the Automatic Level Control System is to provide constant ride height at all load conditions. The Suspension Control module
monitors body-to-wheel height, and vehicle speed.
The Suspension Control module will use the rear body-to-wheel displacements and vehicle speed inputs to keep the rear trim height of the vehicle at
its desired level.
