What are these holes in my Suburban door for?

[RoyL]

Originally Posted by rbar

Yep, your current mirrors are in the "wrong spot" and the other three are factory. Mine doesn't have any mirror mounting spots on the passenger side either. I am thinking about using nutserts for that instead of trying to put nuts on the back side. They work really well and were a great fix for my cowl vent holes where you can't get to the backside. We use them at work all of the time. The flange is really thin and they hold strong. You do have to have the install tool with it.

Went to Fastenal, they had 5/16" and 3/8" sizes of the "nutserts" but the $100+ for the tool was a deal killer. I asked if they had anything else that might work. They have these, Auveco PN 12995, 1/4 by 20 thread size. They are called Jack Nuts, says for mirror mounting. I'm gonna try them. Only thing I don't like about any of these type, is the size of the hole you gotta drill in the sheet metal . . . about 7/16" or so.