One of my folding side mirrors on my Avalanche stopped working (90% of the
time). I can see it flinch when I try to open it. When it does open it makes a
noise like something is not working correctly. Any suggestions?
noise and not opening would tell me there is something binding it or it is broken. Try spraying some WD-40 in there first. If not, you probably have to take it apart to repair and or replace.