2-44 Lighting
serial data message to the appropriate control modules
requesting all dimming components to be illuminated to
the same level of brightness.
Battery Rundown Protection/
Inadvertent Power
The K9 Body Control Module (BCM) inadvertent power
supply voltage circuit provides battery voltage to all of
the interior courtesy lamps. In the event that any of
these lamps were to remain illuminated for a period of
more than 10 minutes with the ignition switch in the
OFF position, the BCM will deactivate the inadvertent
power supply voltage circuit to prevent total battery
discharge. If the ignition switch is turned to any position
other than OFF, or if a lamp switch is activated during
this 10 minute period, the timer resets for another
10 minutes.
2022 - Silverado 1500 (New) Electrical Body Builder Manual
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