I have a 97 1500. I don't have any heat (only lukewarm). both tubes going to the heater core are warm so I don't think it's blocked. I flushed the coolant system. I'm thinking it may be my blendor acuator. It should be a simple process but when I go to the passenger side where it should be I don't see it? All that is there is a round metal post that sticks through the black plenum case. When I move the air settings around the cylinder moves so I know im in the right spot. It's like this is where the blendor actuator should be but there aren't even mounting holes for it. What am I missing?