CURT A20 5th Wheel Hitch, 20,000 lbs, Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD, 8-Foot Bed Puck System Model 16064CURT A20 5th Wheel Hitch, 20,000 lbs, Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD, 8 Foot Bed Puck System Model 16064 The CURT A20 5th wheel hitch offers smoother, quieter towing for your home away from home, combining the patented technology of our A series, an easier mounting system and the power of a 20K 5th wheel hitch. Like our A16 hitch, this 20K 5th wheel hitch uses a patented cast yoke to allow for unimpeded head movement, while