Question about 2000 Chevrolet Blazer

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My 2000 Chevy Blazer will not produce enough heat. The radiator has been flushed with new antifreeze added. The thermostat reaches 180 degrees.

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Did you do the flush and fill yourself? did you put pure antifreeze in with distilled water at a 50/50 ratio? If your antifreeze mixture is pure or almost pure antifreeze, then it will not transfer your heat and will not heat the cab well at all.

Posted on Jan 24, 2011

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2001 Blazer Replaced heater core now water pump is squealing and seems like low circulation


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2000 Chevy Blazer 4.3 / heater cold - using to much antifreeze


How would you be lost or why in the world would
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Jan 03, 2013 | Cars & Trucks

1 Answer

Van produces no heat from the heater, engine heats up when driven short distances. Thermostat was replaced, still no heat. coolant level is fine.


Two things are possible. Air in the cooling system, or the system needs to be flushed. You didn't say what year your van is, but I'm sure it use dexcool antifreeze. Dexcool is the orange antifreeze recommended by GM for all their vehicles. The problem is that dex cool attacks gaskets causing gasket failures, especially the intake gaskets. It also can cause buildup in the cooling system causing overheating, or plugging up heater cores. We'll try the easy solution first.We need to get the air out of the system. First, the radiator needs to be higher than the engine. If it isn't, either use drive on ramps or raise the front end with a jack, Remove the radiator cap, put the heater controls on hottest setting, start the engine and let it run. When the coolant gets hot enough, the thermostat should open allowing the coolant to circulate. When it opens, the coolant level will drop in the radiator. Add antifreeze to make it full again. The coolant will drop again and may do so several times. Just keep adding antifreeze each time. continue to do this until the coolant level stabilizes. If the thermostat closes momentarily it will cause coolant to overflow. Not to worry, wait til it opens again and top off the antifreeze. Put the cap back on the radiator and check the heater for heat. If it' still not warm, you may have to flush the radiator.

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Just flushed rad heater core and block because i had no heat. flushed the system filled with new antifreeze. my temp gauge will change from 150 to 210 I have heat then i dont


Replace the thermostat. I have had bad luck with aftermarket thermostats on this particular year of GM/ Chevy trucks.They tend to stick closed and then fully open, thus causing the temp to sort of surge hot and cold. A good thermostat will slowly open maintaning a good consistant temp. I would recommend spending a little more and getting a GM thermostat.


Please take a moment and rate my answer..........Thanks

Dec 01, 2010 | 1996 GMC Jimmy

3 Answers

I have a 1997 chevy lumina what kind of antifreeze should i use?


The dealer recommend GM Dex Cool Antifreeze.
But there are complaint against this type of coolant.
http://www.stevesnovasite.com/forums/archive/index.php/t-128547.html
In GM cars we replace Dex Cool with Prestone green coolant.
It's up to you. Ask before but if you decide to change the type of coolant then:
If your intention is to add coolant only, then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifreeze
PRESTONE
50/50
PREDILUTED ANTIFREEZE/COOLANT
EXTENDED LIFE up to 150000/mile 5 year protection.
DO NOT ADD WATER.

If your intention is to flush the RADIATOR (Cooling System), then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifrezze
PRESTONE
EXTENDED LIFE up to 150000/mile 5 year protection.
On the back you have to read directions:
Step 1 Drain. Step 2 Flush. Step 3 Fill.
Recommended to ad 30% to 50% volume, distilled water. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection.The next day,with a cooled engine open radiator cap, and test the strength of coolant. If not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary.
Make sure to disposal the used coolant properly.

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Radiator


Before to refill, you must check any clogged on the radiator, hose and status of thermostat.

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1999 blazer 4x4 lacking heat during cold days


t-stat may be stuck open or may have been removed by previous owner

Oct 04, 2009 | 1999 Chevrolet Blazer

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