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To replace the evaporator core on a 2003 Chevy Express van, start by disconnecting the battery and draining the coolant. Remove the dashboard and the HVAC housing to access the evaporator core, which involves disconnecting various electrical connectors, hoses, and screws. Once exposed, unbolt the old evaporator core and replace it with the new one, then reassemble the HVAC housing and dashboard before refilling the coolant and reconnecting the battery. Always refer to a repair manual for detailed instructions and safety precautions.

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7mo ago

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