2000 Chevy Venture no front heat

There are a couple things that can cause this. So, we need to start with the basics.

First and foremost, just check the coolant level.

I understand the rear is working but we need to just make sure so that doesn't bite us.

Then here is a video that will get us into the next areas:

https://youtu.be/SNRb6pSwYuU

If the heater hoses going into the heater core are getting hot, then we have a blend door issue.

https://www.2carpros.com/articles/replace-blend-door-motor

So, let's check the temperature of the heater codes and find out if they are the same temperature or pretty close.

If not, then we have a blocked heater core.

https://www.2carpros.com/articles/replace-heater-core

Once we know more about this info, we can take the next steps, but I included the process below for the blend door actuator as that is the likely issue.

Let me know what you find, and we can go from there.

Thanks