Yes put sealer on the frame between it and every panel to cut down on rattle. I also used it at the seams between the panel. Note there is an aluminum colored GE Silicone II if you can find it.

Do you have the FFR heat and sound insulation package? If so, there is a piece that goes between the gas tank and the aluminum underneath it. Now would be a good time to put that on. The manual has you installing the tank long before it talks about the insulation...

Steve