How do I get the light off of my Nissan Xterra to change the bulb?

I'm having trouble getting off the left rear light on my Xterra to change the bulb. The manual tells you to take out to bolts and take the cover off , but it does come off easy and I dont want to break the light pulling it off Help!How do I get the light off of my Nissan Xterra to change the bulb?look for a hidden bolt on it,,sometimes they have bolts you cannot see right off,and it may have a gasket on it that is making it stick a little also,i have never had one of these out before ,but i mechanic for a living ,and the ones i have done usually have a bolt that you cant see and they will stick sometimes,,good luck with it,hope this help,s,happy new years.