Question about 2002 Chevrolet Tahoe

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Chevy Tahoe 2002 radiator

I am having my heating core replaced and the radiator shop recommended checking out the radiator to see if it is good condition I have 180k on my car, what should normal wear and tear be and what are the possible scenarios I might run in to when they diagnose

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  • merciergal72 May 31, 2009

    ok now I am confused there is no coolant on the passenger side like the dealership told me, my husband checked. we also noticed what looked like an il spill on our driveway which would have leaked from the middle of the car...could that be related to the smell of coolant or a leak from the heater core?

  • merciergal72 Jun 01, 2009

    I definately smell antifreeze when running the car but no leak on passenger side as the dealership told me they felt something slick. We ran a dry rag on the carpet and found absolutley no traces of antifreeze.



    they said they checked all of the hoses but i will double check to see if they checked heater hoses...which by the way are those connected to the manifold? because they just relaced the intake manifold seal.



    regarding the brwon spot on the driveway my husband said there was a drip of oil under the car

  • merciergal72 Jun 01, 2009

    If it was a heater core leak would I see a leak on the driveway under the car approximately midway?

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I would say at 180k miles, and with the heater core bad, it's time to test the radiator.

I wouldn't be surprised if they say the radiator needs replacing (which would be difficult to refute) and along with that, the hoses, thermostat, radiator cap, and maybe some other stuff like sensors.

It depends on how well your cooling system has been maintained, but I would be prepared...

Posted on May 29, 2009

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  • Samuel Charles Spriggs May 31, 2009

    If it's exactly in the middle of the car, and it's oil, it sounds like it's a crankshaft seal leaking oil from the engine. This is typical of a high mileage engine. But it could also be leaking higher up on the engine and running down.



    The heater core itself is usually totally inside the car, and when the core leaks, coolant goes into the floor on the passenger side.



    There could be heater hoses under the hood leaking, but if there is anti-freeze in the cooling system, you would smell it in the leak.



    Rules of thumb: oil leaks = brown,

    coolant leaks = green or yellow (or rusty if cooling system is dirty),

    auto trans leaks = red,

    power steering leaks = red,

    brake fluid leaks = almost colorless to slightly brown;

    + Coolant and brake fluid leaks have very distinctive odors.

  • Samuel Charles Spriggs May 31, 2009

    One other thought:



    If you haven't run the heater in the car recently, the coolant the garage indicated was in the floor may have evaporated. When the heat is off, there is much less pressure on the heater core and it may not leak.



    This is a messy way to test that theory, but you could run the heat and see if you get the leak (again?).

  • Samuel Charles Spriggs Jun 01, 2009

    The oil spot under the vehicle is most likely a crank seal leak -- it usually drips as you indicated and does not flood out.



    Don't remember on this vehicle if heater hoses are attached to manifold, but the hoses would most likely need to be disconnected to remove the manifold.



    If you smell anti-freeze, there's a leak somewhere, no doubt, and you should be able to find a wet spot somewhere. Is the odor stronger under the hood? Are you loosing a significant amount of coolant? Is the engine making any unusual noises? Is there coolant around the radiator cap? Is there coolant on the side of the engine block just under the head(s)?

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Hello I have a 96 chevy tahoe I replaced the heater core the thermostat & flushed the system I had heat when I finished but the next morning it was only blowing cold air could this be the water pump?


Chuck, having done this last year on my 99' Tahoe I will tell you to check to be sure you have filled the system and purged all the air out of it. Be sure to open the heater wide open (all the way into the red area) to make sure the heater valve is letting water into the heater core..You can park the truck with the nose higher than the rear and that will help purge the system of air also. Sometimes it take a while to get the system completely full of coolant.

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I have no heat in my 2002 Tahoe. Could it be the Thermostat or the Heater Core? I really can't afford to take it to a dealership or a mechanic right now. Would like to do the work myself


When your driving down the road what does your temp gauge read? If it is in the normal place, about the middle, than the thermostat is working. The next thing to check is the coolant level. Make sure the overflow and the radiator are full. If the radiator gets low enough the first thing to stop working is the heat. If both of those are full than feel the hoses going to the heater core. They should both feel hot with the engine fully warmed up. If one is cold and one is hot than the heater core is plugged. Back flushing the heater may bring it back to life. Check those out first. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

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I have to replace my right rear wheel seal/bearing on my 2002 Chevy Tahoe and am curious about how much it is/should cost me.


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1995 TAHOE BLOWS HOT AIR OUT THE VENTS DURING ACCELERATION


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First thing check the coolant level in the radiator. If coolant is low the first hing to stop working is the heat.

If the coolant level is fine but the coolant is muddy I woulds suspect a plugged heater core. You can try back flushing it by removing both heater hoses (engine cold) and then use a garden hose to flush clean water through the heater core. Do this on both pipes going into the heater core. Keep flushing until the water runs clear. Re attache the the hoses, remove the radiator cap, start the engine, let the engine come up to temp and top off the radiator with straight coolant (to comp for the water in the heater core). You may have to repeat this process several times over several days but you should be able to get it cleared enough to get sufficient heat without having to replace it.

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Where is the heater core in my 2002 chevy Tahoe and do I need to remove the entire dashboard to change it out?


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Yes you will be required to remove the dash to replace it.

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I just had my a/c evaporator core and heater core replaced two weeks ago. The heater worked fine at the time. I just thought it was a good idea to change since they were changing a/c core, but now my heat...


My sympathy goes to the shop. If they forgot to re-attach something it may be unreachable and they may need to take it apart again. They must guarantee the work and make good on it.
If they try and give you any BS about something else failing so they can charge you again, request to have the part returned to you have an independent party check it and if it is good or has been tampered with ....you can go from there.
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Chevy 02 Tahoe heater core replacement


take it to the cheaper priced shop, the heater core is made by just a few companies, whether it is the same not sure, but if they were not good quality the the rad shop would have allot of expensive come backs.

May 29, 2009 | 2002 Chevrolet Tahoe

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