How do you change a block heater on a Chev?
How do you change a block heater on a Chev? Drain the cooling system, then unplug the electrical cord from the block heater. Then unscrew the block heater from the side of the engine block. More coolant may come out, so have a drain pan under the engine. Installation is the reverse of the removal procedure. When do you put a block heater in a new Impala? When i went to dealers asking about new cars they said "none of the cars come with factory installed block heater, they are usually installed by dealer prior to delivery to customer". So...