Heater core?

Electrical problem
1996 Chevy Blazer 6 cyl Four Wheel Drive Automatic 200k miles

my blazer had the heater core replaced sinse then none of my 4 wheel switches have power the fuses in the panel are good and the switch works on a test blazer what could this be

I changed my radiator, water pump and thermostat and my truck still runs hot.
Could it be my heater core (I don't have heat in the winter) I was told by Fi_esto_e that the heads was bad.

Now there is no smoke and no back splat from the oil and the oil is not milky

1996 Chevy Blazer mileage: 64,754. I have a 1996 Chevy Blazer 4x4 with a V6-262 4.3L engine. About three weeks ago, the heater stopped blowing heated air. Having a father that teaches automotive technology we decided it must be the thermostat. We replaced thermostat with no success. Blower works fine. Coolant level is good. Connecting the scan tool the vehicle temperature only got to 195 after extended running time. Unable to find any info on normal operating temp. For a Blazer we are at a loss. Using the fix of old, we placed cardboard over the radiator and that seems to make it work better not great. With the problem possibly being the heater core or actuator with a dealership repair cost of $500.00 I am no doubt frustrated. Do you know of anything else that we might try or any problems that you have heard about Blazers cooling system? There are no recalls to date on all data. Any suggestions would be appreciated.

Two things to check: First check for vacuum that goes to the heater control, you may have a loose or cracked line which would cause the heater doors not to work properly; Secondly, check for a partially plugged heater core that would restrict the coolant flow.

Have heat but smells even with heat off and very bad when heat is on. I was told heater core.

Yes, it is a sweet smell and at times this does get a fog on windshield. I have noticed dampness on passenger side floor not to bad yet. I had it fleshed to the core once because was not heating well, but after that did have and do have good heat, but the smell is overwhelming from heater, sweet.

How do I change the heater core in my 96 blazer?

Heater problem
1996 Chevy Blazer 4 cyl Two Wheel Drive Automatic

how do you change a heater core in a 96 chevy blazer

Ok I bought a 1995 blazer and the guy said that the heater core busted. So me and my step dad replaced the heater core and put the dash back in. Well now my running lights wont work but when I turn my regular lights on it dings as if the doors are open. So I went to autozone and got the thing for the door so it doesent ding anymore. But now when I start it and I try to do anything like turn on my radio
( aftermarket radio) the blazer dies. I cant do anything or the blazer will die. Does anyone know what would be the problem? Mabey I connected wrong cables or something? Please help me!

Yes anything electrical will shut it down even if I step on my breaks and my break lights will come on. My step dad said that it might be because my battery was dead and we had to jump it so it may be drawing and doesent have anything to draw it from and cause it to shut down

95 s-10 blazer 179, 00 miles smell of anti freeze and temp pegs hot with no heat coming into the vehichle then a couple miles down the road the temp goes back to normal and I have heat. What could possibly be the problem?