93 sil, no heat

ok
the skinny:

i did a motor swap on this van a year or so ago, with the help of some folks on here, it went ok.

everything functions as it should, van does not over heat, and runs at a good temp.

since its been winter, there has been zero heat.
it has electronic controls for the heater, unlike my vw which is controlled by a valve when you turn the heat higher.

what could some problems be?

ive replaced the water pump, and the thermostat.
the fuse tests good.

is there a relay somewhere? is there something im over looking?
on a vw, its not like this, and im a vw tech, not a olds tech.
any help would be greatly appreciated.
thanks

plugged heater core? hoses on the right way? no kinks. or a computer reset. just some ideas for you. 463

plugged heater core? hoses on the right way? no kinks. or a computer reset. just some ideas for you. 463

everything is hooked up correctly. ill try an obd1 computer reset, didnt think of that.

make sure the actuator on the passenger side dash is working.actually under the dash.....

what would that look like, and whats the best way to get to it?