2005 Cadillac Escalade Heater

Is the coolant low ? Do you know where the heater hose's are under the hood in the engine bay ? Back of the engine bay going into the fire wall , feel and see if there are hot . Is one hot and the other only warm . What does the coolant look like ? GM vehicles use Dex-cool , adding regular green preston can cause thing's to gum up an clog . Air introduced into the cooling system can cause Dex-cool to turn into a muddy looking substance an clog thing's up .Can you switch the air modes from floor to defrost , will A/C work .

Hi,It sounds as though the radiator is blocked.the heater might be opening letting in hot air which will over ride the cool air.

Need to get a new coolant temp sensor

The heater core may be plugged. After the vehicle is warmed up to operating temperature, feel both hoses (careful they may be hot) and see if they feel equally warm. If one is noticeably warmer than the other, your heater core is likely plugged.

That smell is most likely antifreeze. If the smell gets noticeably stronger when you turn on the AC/Heater, it is possible that your "heater coil" has started leaking. You will need the services of a professional if that is the case. Those are very hard to change.

Another possibility is your thermostat is not opening, causing your engine to overheat - steaming some of the coolant (antifreeze)/water mixture out of the system.

And thirdly, it is possible that someone spilled antifreeze on the radiator etc when adding fresh antifreeze - and you smell it after the engine warms up. If your car is not over-heating and you are not having to ad antifreeze/water to the radiator, then just keep driving. The problem will most likely go away.

I hope this is helpful to you. If yes, please take a sec to rate me. Thanks!
Don

My 2005 KIA Sedona started overheating in Winter 2009/2010 and was loosing antifreeze. No leaks from the heater hoses or radiator hose. No pressure in the radiator either.

I had found a site where folks were discussing the same things and someone brought up the rear heater. Apparently KIA has run steel hoses running under the chasis to the rear of the van and these rot.

I looked under the rear at the wheel well and located the lines and they were wet with antifreeze. I traced the lines to the firewall and found where the lines were connected to the coolant system and bypassed the rear heater lines.

I then filled up the radiator and overflow tank with antifreeze and started the van. I rocked the van to get air to move out of the lines and kept adding antifreeze until it was full. then used the overflow tank to top it off.

Hope this helps.

If you've added two gallons of antifreeze, you need to find out where it's going. Make sure the antifreeze you are adding is diluted with water in a 50/50 solution. Pure antifreeze has little freeze protection and boils quickly. If there is no visible leak, check your oil for coolant contamination. Fill the radiator and leave the radiator cap off. Put the heater controls on hottest setting, but do not turn the heater on. Start the engine and watch the coolant. If the coolant level drops, add more to full. If the coolant is flowing thru the radiator when you first start the engine, the thermostat is stuck open and needs to be replaced. If the water is not flowing, then keep an eye on it and wait for the thermostat to open. Add antifreeze to keep the radiator full. Look for air bubbles or lots of foaming in the coolant. That would indicate a blown head gasket and the reason you are losing antifreeze. If there's no bubbles, and the coolant level stays full, put the radiator cap back on and see if the heater is working better.

Is what the liquid plain water or coolant (water mixed with antifreeze). touch and smell the liquid, no smell = water, antifreeze smell and oily feel = coolant.
If plain water, could be Air Condition condensation dripping from condensation drain which is normal. (this drain is usually located near the center of the vehicle).
If coolant, could be leak(s) from: radiator, radiator hose, heater hose, water pump, engine freeze plug. A coolant system pressure test should show what is leaking.

Is it wet with water or coolant? If it is coolant you have a damaged heater core. If it is water it could be from a windshield with a bad seal, a leak in the floor or possibly an air conditioning system with a plugged drain tube. There is nothing else that would bring water in from the vehicle. If your are a cold climate and snow gets in on someone's boots it will melt and wait till dry weather to clear.

The squeak you hear is because coolant is leaking onto the belt making it slip and that is the squeak you hear. The reason your heater isn't working is because the coolant is low enough that it isn't able to circulate through the heater core and heat your car. If you are losing a gallon of coolant a week, I would guess you either have a coolant hose with a leak or your water pump is going bad and starting to leak. It could be getting weak which also would cause you to not have heat. I would get it fixed soon before the pump shells out on you and your engine overheats which could cause more damage to the engine.

Good luck