I've got a squeek in the dash. It only happens on bumps. I have reduced the frequency (increased the size of the bumps needed) buy wedging a piece of styrofoam between the windshield and the dash. I took out the defroster vents and tightened the 2 bolts in them (they were tight already, I don't think I turned them at all) and put foam weatherstripping on everything that could rub anything. No effect. I've also taken off as many dash panels as I could and tightened what I could find (not much) and foamed everything. Any ideas?

P.S. I've been away from the forum for awhile. It's good to be back.

 

http://maxima.theowensfamily.com/tsb/NTB99-056f.pdf

 

I'm not sure this TSB addresses it, but I'm going to try a bunch of the fixes (I hear a little rattle in the back, too occasionally). The windshield chock (as I affectionally call it) is in the center of the dash, between the defroster vents, but now I'm not sure the squeek isn't coming from the right A-pillar. I drove 2 hours yesterday and it happened maybe once. Hopefully warm weather will fix it, but I'm going to try the A pillar fix. Thanks!