K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
Body Control Module: Description and Operation
Asleep State
The BCM is asleep when the BCM has stopped controlling or monitoring devices and has become idle again. After the ignition switch is turned to the
LOCK position and 20 minutes (1216 seconds) elapse without any Wake-Up signals, the BCM enters into an asleep state and goes into the low power
mode. If the BCM is in low power mode and detects a wake up, the BCM will enter into the wake-up state and enter the high power mode. If the vehicle
has been left inactive (ignition in the LOCK position and no BCM wake-ups) for 20 minutes, the BCM will return to the low power mode.
