CURT Puck System 5th Wheel Rails, 30,000 lbs, Fits Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD Model 16050CURT Puck System 5th Wheel Rails, 30,000 lbs, Fits Select Chevrolet Silverado, GMC Sierra 2500, 3500 HD Model 16050 CURT OEM puck system 5th wheel rails for Chevrolet and GMC trucks combine the functionality of CURT 5th wheel puck system products with the strength and convenience of the factory truck bed puck system. The rails are industry standard to securely mount a CURT 5th wheel hitch or any other 5th wheel with industry standard mounts. They are