I don't think it was part of the dash rather part of the skeleton of the dash. I am pretty sure unless my car was just different. When you switch out the rely it is a whole assembly that bolts in, I will get some shots of my broken one I still have it laying around here. it can't be installed though the hazard switch hole, I didn't have to take the hazard switch bezel off. It is a pretty good sized piece. look at number 7 on the illustration.
Cost is
$20.06 on
New Gm Parts. That is where i ordered mine from and had it delivered to me.