I have a CC 6 1/2' box Silverado 2500HD. The pin box on a fifth wheel I am looking at is 12 inches in front of the trailer front cap. Is there a formula to see if I need a slider hitch.
Get a tape measure. Measure from the 5th wheel post on the trailer to the front left corner of the trailer. Then measure from the 5th wheel hitch post location to the driver's back corner of the truck cab. Bet the cab is closer on all short beds!