If equipped, the truck engine oil or block heater connector is independent from APU “comfort system”
functions and is energized as soon as APU engine starts. The block or oil heater must be plugged
into the connector when required during cold weather operation. Unplug the block heater connector
from the block heater receptacle when not in use.
DO NOT extend the block heater connector cable or connect extension cords to the connector. The
block heater connector is intended for use with engine block heaters ONLY.
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