Where is the heat blower motor? on 1990 Chevrolet Corsica

Heat would come on and then go off and now it stays off. Don't know where blower motor is located in engine.

Behind the dash on the passenger side behind the glove box.
Thankyou very much. I replaced the motor and fan with one yesterday and daughter-n-law said she now has heat for the grandkids.
Your welcome.