Mine did the same on both sides. I was able to do a little grinding on the bolt on the drivers side, passenger side is the head of the bolt so not much choice. Mine has finally stopped rubbing to where I can clean up and reseal the groove in the frame.I have 2500 suburban springs on my van as well.
On one side, passenger IIRC, the bolt of the spring pack bracket thingy (the u-shaped clip the keeps the leaves in line) that is closest to the front hanger is rubbing a groove in my frame. There is about 1/4" clearance of the same bracket on the drivers side.
Anyone else having this happening? Or maybe I have a bent perch or spring.