Question about 2000 Chevrolet Suburban

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Heater will not blow hot air.

Could this be a thermostat change required and where is it located?

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  • traceday Dec 18, 2008

    my heater will also not blow hot air; and I am having to put coolant in about every tank of gas. My mechanic has pressured it up and it holds pressure.

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Check your heater core it may have a crack or a hose loose

Posted on Feb 16, 2009

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My 01 Cavalier is overheating. I changed the thermostat and do not see any apparent leaks. The heater was blowing hot air before I changed the thermostat and now it's only blowing cool air. Any


What engine 2.2 or 2.4 ?
Important: On vehicles equipped with the 2.4L engine, open the coolant air bleed valve. The coolant air bleed valve is located on the top of the thermostat bypass pipe/heater pipe assembly. Close the valve once a continuous stream of coolant is expelled from the valve.
Does the cooling fan come on ?
Notice: When adding coolant, it is important that you use GM Goodwrench DEX-COOL™ coolant. If coolant other than DEX-COOL™ is added to the system, the engine coolant will require change sooner: at 50 000 km (30,000 miles) or 24 months.
Close the radiator drain ****. Remove the drain hose.
If previously removed, install the engine block drain plugs.
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Important: On vehicles equipped with the 2.4L engine, open the coolant air bleed valve. The coolant air bleed valve is located on the top of the thermostat bypass pipe/heater pipe assembly. Close the valve once a continuous stream of coolant is expelled from the valve.
Fill the surge tank to the base of the filler neck.
Start the engine with the pressure cap off. Let the engine run until the upper radiator hose starts to get hot.
If the coolant level in the surge tank is low, add the proper mix of coolant until the level reaches the full cold line.
Important: After servicing the cooling system, and if the vehicle is equipped with an intermittent low coolant light, an occasional low coolant light may be encountered during some extreme driving maneuvers. This complaint should be eliminated by removing the surge tank cap and adding coolant to a level just at or above the full cold line when the system is cold.
Install the cap onto the tank with hand tight pressure.

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1 Answer

My heater only blows out cool air even when motor is hot. Fluids are full. Going to try to change out thermostat just need to know where its located.


you can change the thermostat. there are two hoses coming off the radiattor. one goes to the heatere core and to the engine block. the one to the block has the thermostat. take the old thermo and boil it in water. if it open up it is not the thermo. the next likely reason is th heater core. Please let me know

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How often has the coolant been changed? My only guess is that it hasn't and the hoses and the heater core are plugged up with goo and a flush is needed

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1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve. here something to help u

Here to help Shaun

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