1994 Caprice LS. Little to NO heat.

Heater radiator leak.It is under the windscreen and can blow hot water (vapor) to the glass.Does it slightly smells heated water?Very rare:rain water in the saim compartment as the heater having the same simptoms.Track the problem,ceck coolant level regularly.Cheers,hope u deal it,let others know.

look on the oil cap to see if it is milky looking if so the intake manifold gasket is leaking

It is not smoke though it appears so. It is thick heavy steam from a coolant leak in your heater core in the cabin area. It will smell very sweet if it is a typical glycol based antifreeze, and the windows will fog up as the hot coolant enters the cabin area of the vehicle. Primarily on the inside of the windshield. The cure is that your going to have to replace the heater core as it is leaking. Do this soon because if it ruptures completely you will have a major mess on the floorboard of your vehicle. Coolant is also poisonous to humans and animals if ingested. The heater core will be a little pricey as will the labor to replace it. Good luck. I guarantee you it is the heater core leaking.

Sounds like you have a small leak in the heater core. this is a small radiator that fits in the heating system to provide the heat in winter. It is an extension of the cooling system and therefore has antifreeze in the core. You may just have a hose leaking a tiny bit around the connetion.

no heat is probably low coolant or bad thermostat,although you have fog and smell ! the heating and cooling systems are closed systems the only way the windows fog is the coolant is hot and steams inside the car due to some leak inside the heater core box. as well as the smell being present. Now it is possible that a little leak has occured where the coolant supply or return line connects to the heater core and is running into the car which is running onto the core and creating steam and smell. hopefully it is a easy clamp tighten fix for you.

Make sure the vent system is set to draw air from outside. If it is set to recirculate the same air that's inside the vehicle without drawing fresh air from outside, the resulting humidity that builds up inside the vehicle can fog the windows even when you run the defrost. You can also try opening the windows a bit to get some more air moving inside.
If it still fogs when the vents are set properly, you may have a leaky heater core. The heater core is a small radiator that is located under the dash that the heater system blows air through to heat the inside of your car and provide heat to defrost the windshield. The fog may be coming from the heater core leaking hot coolant steam that's being circulated through the defrost system. If this is so, you will need to replace the heater core.

If you need to add coolant, you do have a leak. Since your window fogs and have a smell,you heater core is leaking The reason the window fogs is that your coolant is moisture getting blown on to your windshield.

your right as rain

I have a 1994 chevy caprice classic LS. 4.3lLMy odometer meter works off and on...why does it do that? Sometimes I cans see how fast I'm going.. Other times the numberes don't light up. Same problem happen with my signal lights.. They both occur at the same time.. my signal light indicater and my MPH odometer.

had same problem need to flush out the heater core .. plus make sure you do not have a air pocket in the coolant system after you changed the T-stat