Silverado 2500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
Remote Control: Description and Operation
Steering Wheel Controls
STEERING WHEEL CONTROLS
Some audio functions are available using the steering wheel controls. The steering wheel controls consist of multiple momentary contact switches that
connect a series of resistors. When a steering wheel control button is pressed, a specific resistance value is noted by the body control module (BCM).
This results in a generated voltage, unique to the particular button. The BCM alerts the radio that the button has been pressed, and the radio responds,
just as if the corresponding radio front panel button had been pressed.
