where is the heater core located?

Here is a link to the description of a heater core and what it looks like http://www.drivewire.com/chevyparts/heatercore.html. It should be in the middle of the dashboard. Good luck.

it's inside the heater box ,you don't need to take apart the whole dash.

trip65, I know this post is old, but hope your still active on site. Have a 97 Blazer (Chevy). Where is the heater box? What do you need to take apart to reach it? Think mine may be clogged or need replaced. To test/check if its clogged before replacing, will/can having my cooling system flushed accomplish unclogging the heater core?