If you have noticed your rear carpet area getting wet during or after a good rain, don't assume the back glass is leaking. I had sections of seam sealer missing below the back window. I could see into the car. Where the curved bed sides are pinch welded to the rear cab panel below the rear window. I had one spot about the thickness of two nickels just under the rear window lower trim. I removed the back window trim, picked out the seam sealer to the bottom of the bed floor, taped off my rear window, used a small sandblaster on the seam, blew it out, and sprayed it with an aerosol can of SEM self etching primer. I let it sit all night and then used tape at the edge of the seams and ran my new seam sealer through a caulking gun down the seams. I then smoothed them with my finger and pulled the tape. Looks real nice with crisp edges. I got new carpet but don't want to install till the water leaks are fixed.