Ok i have blazer 99 LT for euro market. It has power mirrors with dimming function or whatever it called :-) my question is that booth mirrors should dime in night or just driver one? I also have power folding mirrors but it works only on driver side, on passenger I hear nothing when I put the switch down so I suppose something could be disconnected or maybe some fuse is broken? Where I should take a look first?

 

you might try looking at the wire loom inbetween the body and the door sometimes after years of use the wiring will fray or break inside it

 

But can you tell me is that passenger mirror is also photochromic or only driver one and that in center?
Steering and heating on passenger side works so only left that folding or that photochromic if they made it.