I bought this not seeing the DOES NOT FIT 1500.  Well.....it fts just fine.  I had to drill a few holes in the seat risers and get (4) 10x1.5 bolts and i was good to go.  I'm super happy with the results.  Now there is a small bracket under the seat that is riveted in, that has to go and there are a few studs under the carpet that need cut off to allow it to sit properly.  Otherwise, very happy with results.  I leave the seat lifted slightly to allow the sub to run smoothly.  if you have a rear passenger in that seat, turn the sub down!