replaced radiator,cap,heater core,and thermostat.still no heat on 1999 GMC Jimmy

heater control valve or dash switch? where is the control valve.any ideas ?thanks

Asked by for the 1999 GMC Jimmy
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thanks for the info,would still like some input on my problem.radiator also builds pressure but the waters not hot enough to burn you ,gauge says about 195
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You have a blend door that controls heat. That door is controlled by a blend door actuator. Do you automatic temp or manual control?
its manual control any way to make sure its the dash control without the process of elimination or the door actuator thank again