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How to bleed coolant on a 01 blazer 4.3L - Blazer Chevrolet Cars & Trucks

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There is no bleed procedure. Fill it and top off the overflow wait for the T/T/stat to open and then add to the overflow as it gets sucked down.

Posted on Jan 14, 2013

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Posted on Jan 02, 2017

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My 96 blazer 2 door is over heating. I have had the thermostat changed, and had a flush and fill done. It is still overheating with cold air coming out of the vents when i turn the heat on


Hoe hot does the engine get in degrees F? Can you check for coolant flow through the radiator?
As far as your heater, are the heater hoses hot on a warmed up engine? The radiator fan works ok?
Does the coolant boil over, the coolant reservoir fill up in a hurry?

Jan 23, 2018 | Cars & Trucks

1 Answer

I top off my rad fluid 01 protege LX and didn't close my cap properly and it came out. I added coolant but now there is no heat and it's over heating. Please advise.


it is highly likely you have trapped air in your coolant system...depending on the amount lost it may need bleeding.

Aug 21, 2016 | Cars & Trucks

4 Answers

The blazer has over heated twice in a week. I noticed steam bubbling out of a hole on the top of the water pump behind the pulley. Is the water pump bad?


Very possible that indeed the water pump is bad. These things do have a lifetime, and 15 years isn't all that short a time.

Jun 11, 2015 | 2000 Chevrolet Blazer

1 Answer

Blowing cold air engine overheating


You will need to bleed the coolant system. There will be a bleed screw on the left hand side of the manifold. There is not enough coolant to flow through the heater core.

Mar 23, 2014 | Chevrolet Cars & Trucks

1 Answer

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.
When installing the drain plugs, use pipe sealer GM P/N 12346004.
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.

Jan 08, 2018 | 2001 Chevrolet Cavalier

1 Answer

How to bleed a hydralic clutch on a 2001 chevy blazer


You must reverse bleed it. Go here to learn how. You will need to buy the tool pictured.

Dec 05, 2012 | 2001 Chevrolet Blazer

1 Answer

Heater blowing cold air after radiator flush


you have air trapped in the cooling system, do the following procedure to purge the air out.
The generic method of bleeding air from the cooling system is to use a floor jack and raise the front of the car as high as poss, then fill the coolant recovery tank full and run the engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be pulled from the recovery tank, repeat as necessary, never let the recovery tank run dry or more air will be pulled into the cooling systeml , if it still overheats then you need to have the head gaskets checked with a gas analyzer for hydrocarbons present in the radiator or recovery tank

Jan 03, 2010 | 2002 Chevrolet Blazer

1 Answer

1999 s-10 blazer heater is not hot . put in brand new thermostat full of coolant a/c works fine


Check operation of the heater core coolant control valve and associated remote control mechanism.
Check heater coolant hoses are not kinked or crushed,
Check that both inlet and return heater hose is equally warm, as this indicates coolant flow through the heater core.
If no coolant flow:-
Check cooling system is correctly filled, taking care to bleed off any air locks from the system as necessary (with heater coolant valve open);
Check heater core is not blocked- if blocked you may be able to backflush.

Dec 05, 2009 | Chevrolet S 10 Cars & Trucks

1 Answer

Changed radiator and thermostat in 1985 chevy blazer it ran at 210 degrees, then I drove up and down a hilly terrain and needle approached red zone inside gage, what's wrong?


195 degrees is the hottest thermostat you can buy, and the warmest your Blazer should get to.

Did you bleed the air out after installing the thermostat? Trapped air will not allow the coolant to do it's job.

Jul 30, 2009 | Chevrolet Blazer Cars & Trucks

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