rear bumper sag

I have a 1996 GV and I have to say I love it to death. One thing I noticed is that a lot of Grand Voyagers have a problem with the back bumper. Does anyone know if there is a way to tighten the molding part back up? My 6 year old used it as a step and the middle of it looks like it is a little out of place now? I know it is not a huge problem but I just thought others might have come across a fix.. Like I said I see a lot of bumppers with this problem on the molding, is there an adjustment for this ? Thanks

You have to remove the facia (the moulded portion) and using a heat gun, form it back into shape. Be careful not to apply too much direct heat as this will cause burn and stress marks. Well the facia is off, check the bumper beam to make sure it is neither deformed or or damaged. Replace the facia, tighten the bumper bolts underneath and you should be all set.