Hi I am having trouble with my AC system on my 93 S10 blazer. I am have a problem with my AC is only blowing out the bottom vents and defroster vents. So I’m trying to locate my blend door actuator but I don’t know where it is

 

I'm not familiar with the 1st gens but in the 2nd gens, if the problem is from where the air is blowing, it is more likely a vacuum leak in the hoses that supply vacuum to the actuators that direct the air in the under-dash plenum.

Again, in the 2nd gens, if the issue is you cannot change the heat, whether in AC or non-AC mode, then it is the electronic blend-door actuator. (These fail by the axle in the electronic module slipping when the gear in them cracks.)

 

How would I find a vacuum leak

 

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