Tailgate alignment / adjustment help please

[Luke87gt]

Originally Posted by 67-72C10

It is just out of square. Put a stake about 3 feet long in the rear bed pocket. Starting on the drivers side standing in the bed push out on the stake, have a buddy watch the gap go just a little past what you want and check it until you get the gap you want. (If you go to far pull it back.)
On the right side do the same except pull the stake just a little and keep checking it until you get your gap the way you want it. ( If you go to far push it back. )
The tailgate should slide over to where it needs to be. I hope this helps you...

It seems the bottom of the bed sides would need to be adjusted more than the top. Any tips there?