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Where is the heater control valve on a 1990 Chevy 1500 with a 5.7 350 tbi

(1990 Chevrolet 1500 Pickup)
on December 28, 2017
I am trying to get my heater working. I have a list of possible problems/ solutions that I'm working through. I just replaced the heater core and was moving on to the heater control valve but can't find it.
How long have you had this problem? Haven't had a working heater or ac since I've had it
Tags: chevrolet, 1500 pickup
Displaying 2 answers & 4 comments
Popular Answer
on December 28, 2017
What’s the engine temperature after runnng for 20 minuets? .... Are BOTH heater hoses getting HOT when the engine has fully warmed up??
on December 28, 2017
(Nevermind.)
on December 29, 2017
Yes both heater hoses and the heater core are hot now. My engine temp is at the line between 210 and 260 and the coolant is full
on December 29, 2017
Now the engine temp is back to the normal operating temp
on December 28, 2017
I don't think there is one on this model. What exactly is going on? Blower works just no heat?

Alex
on December 28, 2017
I didn't think there was because I couldn't find it. Wanted to make sure. Not really any heat even when I am driving. The blower doesn't work either. I have a 97 1500 that everything works on so I'm switching to my 90. I just replaced the heater core also
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