S&B Body Mounts offer great vibration isolation and will not crack or breakdown like the OEM foam or rubber bushings. Also comes with corrosion resistant coated steel cups and bolts. Stock body mounts deteriorate over time and cost a fortune. Urethane mounts are hard and squeak.
S&B's Silicone Body Mounts give you a smooth stock ride and last the life of your truck. 
Details:

Fits: 2006-2013 Chevrolet/GMC 1500, 2006-2014 Chevrolet/ GMC 2500/3500
Cab Type: Standard
Material: Silicone
Pieces: 6 Piece
Sold As: Set
Lifetime guarantee on parts and labor.*

*Must be installed per GM Installation Instructions. $150 cap on labor.