Anyone know if the seal just pops into grooves or does it have to be applied with 3M adhesive? I've never taken the cab off, but it looks like it is starting to leak inside behind the driver's seat. Carpet is a tad damp after a hard rain. It is right behind the driver's seat where the carpet (floor board) starts to tilt towards the door. Probably an area about 5"X7". I would think the seal just pops into some grooves given that it was designed to come off and on. Anyone have the part numbers for the seals, so I can check out gmpartsdirect.com?