Question about 1999 Chevrolet Silverado 1500

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99 Chevy Silverado is overheating after maintance on radiator

99 Chevy Silverado Truck is overheating after simply changing coolant. As maintance we drained and refilled the radiator. Next morning truck overheated. We have now changed the thermostat with a new one, still overheats. Went without a thermostat and it still overheats. The water in the resievor is boiling hot. Also no heat is coming out of the heater vents. Any ideas what could be wrong?

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  • Anonymous Mar 15, 2014

    when turn on the truck white smoke comes out from exhust pipe and smells like antifreeze. the oil look kind of dirty ,but oil is new.

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Check radiator, could b blocked, check hoses, mayb they soft, while vehicle running c if hoses r compressing, if they r would b iether radiator or hoses

Posted on Mar 12, 2009

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Try checking the hoses for blockage,and if not that make sure the fan is working right as it might be the fan cluch,or your water pump may have went out,best of luck

Posted on Mar 12, 2009

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Have 2005 chevy Silverado and its overheating have changed the water pump and thermostat have new hoses what else could be the problem


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Good luck

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After replacing the thermostat, you must bleed the air from the cooling system.

To bleed air from the 2.2L and 2.5L engines, remove the plug or sensor on the top of the thermostat housing. Fill the radiator with coolant until the coolant comes out the hole. Since the plug is made out of steel and the thermostat housing is aluminum, it is a good idea to apply an anti-seizing compound or Teflon® tape on the plug threads prior to installation. Install the plug and continue to fill the radiator. This will vent all trapped air from the engine.

Any trapped air in the heating system will have to be displaced by coolant. Once the cooling system is filled, with the radiator cap off, turn of the heater at it's highest setting. Start the engine and allow it to reach operating temp. You should see a drop in the coolant level as the air in the heating system is displaced by coolant. Add coolant to the proper level and replace the radiator cap.

Keep a close eye on the coolant level for at least the next couple of weeks. The cooling system is a "closed" system. Any significant decrease in coolant level indicates a problem.

If you have any questions, let me know.

Please take the time to rate this solution.

Drive safe and be warm.

clarkco

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That hose goes from the coolant reservoir to the radiator, just under the cap. It may have a connection in between, but that is where it ends up.

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There is a hose from the top of the radiator at the radiator cap that goes to the overflow bottle, where u can add coolant, is this what u are referring to?

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