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To replace the heater core in an Oldsmobile Silhouette, start by disconnecting the battery and draining the coolant. Remove the dashboard by taking out the necessary trim and screws, then detach the heater core cover. Disconnect the heater core hoses from the engine compartment and remove the old heater core. Install the new heater core, reassemble the dashboard, reconnect the hoses, refill the coolant, and reconnect the battery.

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1w ago

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