Impala V6-3.5L VIN N (2006)
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Ignition is turned ON.
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Park lamps are ON.
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Keyless entry or remote start message
The BCM will enter a sleep state when all of the following conditions exist:
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The ignition switch is OFF.
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No activity exists on the serial data line.
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No outputs are commanded.
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No delay timers are actively counting.
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No wake-up inputs are present.
If all these conditions are met, the BCM will enter a low power or sleep condition.