Heater is not producing hot air

When you are not getting enough heat to your heater, you could have either an engine temperature issue or a temperature blend issue inside the car with the heater controls. Testing is required to narrow this down; monitoring actual engine temperature is step one with a good diagnostic tool. If it is within specifications, then check inside the car with the temperature blend operation and heater controls.

We have ran into problems on GM cars the cause of the no heat or low heat could be cause by temp door dash could be stuck, or it could be a plugged up heater core. please get it diagnosed.