Correct, I removed the bolts holding the "body mount sleeves" together. The body mount sleeves are the part with the mushrooming heads that compress and hold the bushings in place. Before I choose to drill them out I tried everything I could to get them out, including a punch and 20lb sledge, heat, PB blaster, etc. Mine would not budge and for the ones on the core support and front of the cab getting a sledge in was impossible. I got a kit that had all new sleeves (6) 12 pcs total. I got new grade 8 bolts as well. I figured if I was going to do it I didn't want to do it again. I removed the bolt holding the sleeves together and drilled them out from the bottom. For most of them the bottom mushroom head broke free and I slid off the bottom bushing and slit the rest out from the top. I then replaced bushings and sleeves and bolted it back together. This was 2 years ago now and I have had no problems and a lot less noise.