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Remove both heater hoses from the engine, then fabricate a fitting to attach a garden hose to one of the heater hoses. Direct the remaining hose into a bucket then slowly turn on the water until the water runs clean. Then reverse the flow by switching the garden hose over to the other heater hose and repeat until the water runs clean. Then replace the hoses to the engine and refill the coolant reservoir.

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14y ago
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Q: How do you flush the heater in a 1996 S-10 blazer?
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