Chevrolet Avalanche 1500 loss of coolant with rapid drainage issue on Chevrolet Avalanche 1500

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Avalanche 1500 owners report experiencing rapid coolant drainage due to common causes such as loose hose connections, a broken radiator, or a failed water pump. Others have noted that leaks in the system, a malfunctioning radiator, or a blown head gasket can also contribute to this issue. Signs of a coolant leak include overheating, high-pitched squealing sounds from the belt, a drop in coolant levels, white smoke from the engine, and colorful puddles underneath the vehicle. If the radiator is leaking, some owners find their vehicle begins to overheat. To prevent rapid coolant drainage, it is recommended that owners regularly inspect the coolant system for visible damages and avoid driving the vehicle until the issue is resolved by a professional. Addressing coolant loss promptly is crucial to prevent further damage to the Chevrolet Avalanche 1500.

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