The General's 1990-1996 U-Body "Dustbuster" minivans were available in North America wearing Chevrolet, Pontiac or Oldsmobile badging. There was a time when it was easy to find these vans in car graveyards, but they've become junkyard rarities in recent years. Here's a nicely preserved Silhouette, found in Nevada last summer.I found so much great stuff (including a Porsche 928, a Ford Courier, a super-clean 1988 Nissan Maxima, an early BMW E28, a 1975 Chevy Chevelle and a Merkur Scorpio) when I