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To replace the coolant reservoir tank on a 1999 Cadillac Eldorado, first ensure the engine is cool and then disconnect the negative battery cable. Remove the hoses connected to the reservoir, followed by the mounting bolts securing it to the vehicle. After removing the old tank, position the new reservoir in place, secure it with the bolts, and reconnect the hoses. Finally, refill the coolant system and reattach the battery cable.

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4d ago

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