Your heater core is shot. Disconnect the hoses leading to the heater core in the engine compartment. This will allow you to still drive the car and not get poisoned by anti-freeze vapor.
Make sure you connect the two hose together to allow the coolant to flow by to the engine. Don't forget to top off the coolant level.
Gee the skater..
make
White smoke with the a/c on means that the a/c system is freezing up and you need to check the pressure switch........... White smoke with the a/c off means that you have a leaking heater core........
The most common thing will be that you have a leaking heater core...........
A fine mist coming from the air system is engine coolant. The most common cause is a leaking heater core.
There is smoke coming from the chimney atop Petey's Pub. Stand on the cover there for a minute to partly block the smoke. Then the parrot can be found in the palm tree to the far right.
== == Could possibly be a heater core leak. Coolant is getting blown up through the vents when you have the heater on. May need to do a heater core check and replace. if you have the a A C on it means that your A C freon its leaking, also if you run the AC on with one window open it will create smoke fron the humidity coming in to the car if it's white somke it's dangerous "cause it will put you to sleep while you drive and you will not feel it..
A vent window on a Blazer? Wow, it must be an old one. Need to know what year you have.
should be the same door and yes you should be able to eliminate the vent window as it just bolts in the door, I didn't think a 68 had a vent window.
If it doesn't smell like smoke it could be comdensation off the evaporator core. You might have a clogged evap. case drain. If it is left unchecked it will start to smell moldy. If it is smoke, it usually be gray or black due to melting wires(also stink), afaulty blower bearings( would make noise).
white smoke
white smoke
white smoke
white smoke