I have changed the thermostat, radiator cap, and water pump. The heater blows cold air. When the truck heats up, then the heater blows hot when truck is reg temp. Please help.
By Bill E. from Oakhurst, CA
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Generally you get cold air until the truck heats up, allowing the engine to reach operating temp more quickly. When this happens, the hot air is then given to the driver/passengers. If you are not getting enough heat, consider changing the fluid.
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