Need some clarification on the cross sills. Here's what I know: there are 4 cross sills; 3 are similar one is different (that's the one at the tailgate). Now my question: of the remaining 3, two of them have sliding 'player's at the bottom ,one does not. Should all three have the plates or only two? If only two does the one without the plates to at the cab and if the bed. As always thanks for your help.
