Question about 2001 Chevrolet Lumina

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CHEVI LUMINA 2001 HEATER failing...might have slow dex-cool leak

Hi from Allan Speilman, This is a great site!!! My 2001 Chevi Lumina seems to have a problem with the heater. Luckily, as of now, the air condotioner still works...... here is the issue... a) IT TAKES A VERY LONG TIME for the heater to heat up. This means that I cant rely on hot air to defrost the windows. Dangerous! b) Once the heat comes on, its ok as long as the fan is on 1. BUt put the fan to 4 or 5 and the heat stops working. HINTS: My mechanic noticed that the dex-cool anto freeze was running low, but could find no ACTIVE leak. He added dex-cool, but the prolem and the low kevel of dex-cool came back. Do you think this is a problem with a leak, or pehaps a dying heating coil, or even a broken heater - air door?

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The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow.

If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm.

If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air.

If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted.

One or a combination of these factors is likely the culprit in your case.

Flush the heater core 2-3 times, and if the obstruction does not clear, a new heater core is required.

However in your case, a cracked head is suspected - this will give out a plume of white smoke on startup - There is no smell, carpet dampness, or abundant moisture in the cabin? (this warns of a leaking heater core)

The coolant is leaking through a gasket or crack, and entering the combustion chamber. You dont see a leak on the ground because it is being burned up with the fuel.

Good Luck, and thanks for using FixYa - A FixYa rating is appreciated!!

Posted on Jan 26, 2009

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Well Allan i'am alittle confused here trying to understand your problem. Now does the temp guage move off lowest setting up to temp. like from0 to 210 or 220 and stays there or does it fluctuate up and down? or do you mean heater blower works on #1 setting? and quits on all other settings? does the air or heat redirect when you move the selector? and what type of heating system do you have? is it like blower, temp., and redirect selector? or is it a climent control type. as far as the low coolent is concerned it could have an air pocket in the cooling system witch can account for no heat and low coolant if it is blowing coolant out because of the air in system. there is alot of variables here. #1 air pocket,2 clogged heater core 3 heater blower motor resister (if blower does not work on all speeds) and 4 thermostat. come back with some answers and i will try to help. or maybe chk. some of my sugestions. good luck.OLD.SCHOOL.

Posted on Jan 26, 2009

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What is happening is the coolant is getting low and air is getting trapped in heater core. your leak is most likley intake gaskets. this is common on these

Posted on Jan 26, 2009

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1 Answer

I have 99 chevy lumina and i just received a 96 chevy is it possible to put the motor from 99 lumina in the 96 lumina the only difference is the dash is different


the engine block is the same but their are some changes such as sensors ---computer software -and in 1999 chevys been using dex cool the red coolant verses the green they are not compatible would need to do a flush before using engine but since you have a donor car should be able to do a swap just make sure you grab all and correct electronics with it

Aug 04, 2015 | Chevrolet Chevy Cars & Trucks

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In a 1997 chevy lumina do use 50/50 dex cool or concentrate?


You may use either one. The 50/50 is pre mixed for you. The concentrate you will have to mix with water at a 50/50 ratio yourself. The concentrate is the better buy because you get two changes in one bottle and your not buying water.

Hope this helps Mike

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Where is the Location of the Block Heater on my Chevi Malibu V6


As far as I know, only diesels have block heaters. If i'm wrong it should be on the side of engine under the head.

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My consern is that my 1999 chevy lumina has thick, black, oily residue all over the inside of radiator cap and appears to be down in the radiator also. what could this be and why would this be there


Does it have an engine oil cooler? There will be cooler lines going to the radiator. Smaller lines will be an automatic transmission cooler and larger would be engine oil. The internal coolers can be leaking inside the radiator. Check those fluid levels as well. If one or both are low that may be where its going.

Then it could be transmission fluid but I would hope you don't let it go until it gets black.

Also, what color is the coolant? Is it the original red? May need to just flush the cooling system. There has been compliants on the factory red Dex-Cool. It would create sludge and plug heater cores.

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1994 Chevi Lumina APV (van)


If you havent replaced the battery I would start there. If the battery has a dead cell in it then it will effectively remove the charge that your alternator is putting out causing your vehicle to stop running because it has no power. I would jump start the car without the battery hook up and remove the cables and see if it runs that way. If it does you have a bad battery.

Apr 07, 2010 | 1994 Chevrolet Lumina APV

1 Answer

I need the engine wiring diagram for chevi


1996 Chevrolet Cavalier 2.2L SFI OHV 4cyl

This is a sample for an 1996 2.2L (VIN 4) engine schematic...
4773406.jpg

You can find more details and the Repair Guide about your model in autozone.com (free register). Select the Year, Make, Model and Engine for access.

I hope help you with this (remember rated this help) Good luck.

Oct 14, 2009 | 1996 Chevrolet Cavalier

1 Answer

Re: Dex-Cool in 1999 Lumina


The major reason for using dex-cool is that antifreeze is often neglected as a service item. If neglected, it becomes acidic over time which is particularly important with the use of aluminium in most major components which are served by antifreeze. Acid causes etching and premature failure of gaskets and permanent damage to blocks, heads and especially the radiator and heater core, which are not vert thick to begin with.
Since "normal" antifreeze acidifies faster than does dex-cool, mixing both together causes a change in breakdown rate...the more "normal" coolant added, the faster it breaks down.
Both coolants do not react chemically with each other and therefore retain the same ability to prevent boil over and freezing.
In reality, normal coolant can be used with little or no effect on components, provided that you change it every year. (that's where the EPA gets involved) They do not want people dumping this stuff into the ground, so they push for extended service intervals. Since dex cool has a longer service life, that's what they want you to use.
As far as how you chasnge the coolant, it is always a good idea to flush system during a change, regardless of antifreeze type. This removes solid particles which can plug radiator core. Radiators are much smaller than their older counterparts. Loss of even a small portion of cooling area can cause overheating. Engine running temps are also higher than older vehicles (heat=power output). Therefore most systems have a much smaller margin of error than before. What I find though is that regular flushing can also be bad for the system as the chems eat away at metal components in order to clean. I recommend regualr or dex cool antifreeze systems be flushed with water only, once a year, but retaining what you removed and filtering it through a coffee filter, using it during the year to "top off" the system. To retain effectiveness of coolant, use a hydrometer to check concentration, adding new coolant to bring reading to proper protection level.Then, every three years, do a complete chem flush and change entire batch. This keeps your system clean and the epa happy!

Dec 17, 2008 | 1999 Chevrolet Lumina

1 Answer

1999 Lumina 6-cylinder: which antifreeze can/must I use?


If your car is supposed to take Dex-Cool, it should say somewhere in the front of the car under the hood, usually near the radiator or on it.

IF it does take Dex-Cool, do not use anything but that in your cooling system.
Mixing any other antifreeze with Dex-Cool causes them to react with each other and corrode your radiator and hoses with a rust-like material.

Dec 17, 2008 | 1999 Chevrolet Lumina

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