Before I type away the car has gotten the following changed 3-4 months ago
Upper and lower radiator hoses
Radiator cap
Water pump
Thermostat
Coolant flush
Resistor
Blower motor
It's an LS 3.4L 2003 btw

Now, the car blows hot air sometimes. Other times its just luck warm air/cool air regardless if I'm idle or while gassing it. There is no loss in air flow.

Clogged heater core?, I'm not having the symptoms of a bad heater core like foggy windows or leaking coolant in the interior

I know my hvac control ***** aren't fully working but only speed 1 & 2 don't work, everything else is good.

1. I'll see if I have enough coolant in the radiator (air pockets)
2. Check temp of heater hoses and radiator hoses (clogged?)
3. I'm clueless beyond this point...
Any help is appreciated.

 

Ok heater hoses are hot, 179 degrees both.
Radiator was a quarter of a gallon low but I just filled it up all the way
Radiator hoses are both hot 181 degrees both.
Heater currently is blowing hot but I cant say it will stay that way until I drive it around which I'm about to do right now.
At this moment I'm bleeding the coolant system just to be sure.

 

Ok I figuered it out. Radiator was 2 gallons low on coolant and after filling it and test driving it its acting normal now. I bleed the system 12 times maybe more but bow it's blowing hot continuously.

 

I'm betting your fan speed issues is a failed blower motor resistor.
If your passenger side carpet is wet, then this is probably the real cause/fix:
https://montecarloforum.com/forum/fw...lem-fix-26663/

As for the warm vs hot, could be air in the cooling system still is my best guess at the moment.

 

My climate control module went bad like that too. Mine was only working on 1,2, and 5

They are pretty easy to replace, Not as intimidating as it seems.

I skipped the steering wheel trim,because the plastic in there is real fragile(@1:30), and just pulled the dash bezel over it, by tilting the steering wheel all the way down. If you do try it just don't try to shove the trim back on real hard, or the clips will snap off and break. Also be careful with hazard connection because that thing will snap right off. Ironically the guy in the video broke his off.(@5:05) If you do break it, rough the surfaces up and epoxy them back together. Mine was broken prior to taking the dash bezel off and the epoxy worked perfectly.

Found the module used on ebay for $30 if I remember right.

After the removal shown in the video, It's just two screws on either side of the module. Then you pull it out and there is three connections. All the connections are unique and can only go in one way, so you don't have to worry about mixing them up.

 

Yea I figured it out yesterday. Radiator was really low on coolant, filled it up and bleed the system a few times now it's back to normal. Glad it wasn't the actual heater core