i have a 2002 blazer,4x4,4dr, not getting enought heat on the floor area . i change all the vacuum line hose in the engine area,installed a new blend door actuator insude the glove box,and a nnew HVAC Switch control below the radio,new blower motor ,new blower restitor. Still takes a long,long time to get heat, not very hot, just warm and checked the anti-freeze all is ok. im getting all different kinds of do this ,do that, all the mechanics cant even solve the problem,Im a female who needs the correct answer and stop buying and fixing all these thinfgd, im ready to sell the damm blazer, but my dad gave to me before he died and want to get it back to where it will be a pleasure to keep. .Also, some mechanics say they can t get parts for it, ,but thats bull crap. What does heat have to do with get MOREHEAT INSUDE. oh, the heater core was also replace 2yrs ago. Ibelieve ther is air in the system as i read all the threads, Ok, guys hit me with all your solving answers ,im all ears,please, tks and god bless who answers my problem.......

 

Just so I understand is the problem with the heat just at the floor or does it not get hot at the vents or defrost either? If nothing gets hot then there are three likely possibilities:

1. System needs to be burped to get an air bubble out.

2. Thermostat is stuck open and needs to be replaced.

3. System was not properly flushed and a clog has developed.

With the parts you have replaced, either #1 or #2 (or both) would be most likely.

When your truck is fully warmed up and you've been driving around, what is the highest temp shown on your temp gauge while driving?

Let us know if this is a heat issue or a direction of the heat issue.

EDIT: I misread one part of your post, didn't note your heater core was replaced 2 years ago. Thought it was recent. If you are not getting heat anywhere, and you were previously it may be the core is clogged and a back flush could solve it. Especially if it sat for a length of time. When engine is at full operating temperature, feel the two hoses going to the heater core for a noticeable difference in temperature.