1990 heater core
Take glove box and door off
Remove knee bolster and supports
Take lower dash frame support bolts out
Take console dash cover loose
Take lower console dash support bolts loose
Take 1/4 socket and extension take bolts out of heater cover
Carefully pry right side of dash up and remove heater cover
While still pryed...
Remove heater core, you did remember to drain water and take the hoses loose right?
Reverse the above.
When you start removing cover and core, you'll see why you took the glove box out






