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To replace the heating hoses on a 2003 Chevy Avalanche, start by allowing the engine to cool and then relieve the coolant pressure by removing the radiator cap. Next, locate the heater hoses connected to the heater core, typically found at the back of the engine compartment. Use a pair of pliers to loosen the hose clamps, then carefully remove the old hoses. Install the new hoses, secure them with the clamps, and refill the cooling system with the appropriate coolant before starting the engine and checking for leaks.

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3w ago

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