CURT A25 5th Wheel Hitch, 25,000 lbs, Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD, 8-Foot Bed Puck System Model 16066CURT A25 5th Wheel Hitch, 25,000 lbs, Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD, 8 Foot Bed Puck System Model 16066 The CURT A25 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 25K 5th wheel hitch. Like our A16 and A20 hitches, this 25K 5th wheel hitch uses a patented cast yoke to allow for unimpeded head movement,