My heater just went out yesterday I turned car on and turned on the heater and no air would come out not sure what it could be if anyone know's please let me know thanks.

What is your question?

So my heater went out yesterday, I started my car and turned on the heater, there was no air coming out, so i was thinking it could be the thermostat. But today I started it, i turned the air on to see if it still wasn't work but the air started blowing and heat was coming out so what could the problem be. It started making notices like when i would turn on the heater or even ac it sounds like something needs to be oiled bad squeaking sound the sound started about a month ago. It's a 2000 oldsmobile bravada. Any help is appreciated sincerely Lupe

How long has your 2000 Oldsmobile Bravada had this problem?

A few days