The switch has 4 wires that go to it. 3 of them go to the cruise control module, the other 1 is a power feed wire from the ignition hot. Colors of the wires are: Blue, Which is the 12 volt power supply from Ignition Hot. Green, Sends 12 volts to the cruise control Module when the switch is in the on position. (cruise Input control). Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. Steep grades may cause variations in selected speeds. System has capability to cruise, coast, resume speed, accelerate, and tap-up and tap-down. The main components of the cruise control system include the

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The average duration of each pulse is 10 milliseconds. If vehicle speed drops 5 m.p.h. below set cruise speed, the module will hold the vacuum valve in the completely open (energized) position. If vehicle speed exceeds set cruise speed by 3 m.p.h. or more, then module will hold the vent valve in the open (de-energized) position.. CRUISE CONTROL 4.3L VIN X 4.3L VIN X, Cruise Control Wiring Diagram for Chevrolet Silverado 1500 2004List of elements for 4.3L VIN X, Cruise Control Wiring Diagram for Chevrolet Silverado 1500 2004:A/tA10Anti- lock brakes systemBrake fuse 10aClass 2 dataClutch pedal position switch (top of clutch pedal)Clutch sw inputComputer data lines CRUISE.