It is a tough job, you will need to remove your front seat, it will be nearly impossible if you don't have all the room that you will need. It will be difficult to work with the front seat in place but, if you do it, it can be done. I say remove the seat because it will be much easier to work without it. there are only four bolts holding it on anyhow. Okay, let's get down to it. You will need to remove your inner fender skirt (the plastic fender)You will need to remove all the bolts and or nuts holding your fan blower cover to the firewall, there are either eight or nine to remove. After those are removed, take off the housing, also take off the ground and your realay switch,go to the interior of the car and wiggle the interior plastic housing loose, now comes the tricky part, there are small screws holding an aluminum cover over the heater core, remove all these small screws, also remove any rubber grommets, now wiggle that loose, you can use a screw driver to get it loose where it is stuck, DON'T force it, now reach in a pull out the heater core, go in reverse to put it back together. Hope this helps, I just did one myself.
how do you change a heater core on a 2003 ss Monte Carlo
How do you install a new heater core on a 1979 chevy monte carlo?
Under the dash
heater core
Your heater core is likely bad
Low coolant? Bad thermostat? Heater control cable not adjusted properly? Heater core airbound? Heater core plugged?
They are on the backside of the engine and go into the firewall.jd
On the passenger compartment side of the firewall, up and under the dash.
This is sort of a difficult job. The black housing under the hood (on the passanger side) has to be removed. The heater core is mounted inside that housing.
Heater temperature control valve.
Check coolant level? Heater core plugged restricted, or airbound? Defective thermostat? Water pump not circulating coolant? Heater control cable not adjusted properly?
This is either the heater core leaking coolant or the air conditioning drain line is plugged. If the water tastes sweet on your tongue or is warm it is from the heater core.