How to I check and/or change my cigarette lighters?

I have 2006 trailblazer LS L6 and in my book one cigarette lighter is listed in the fuse box under the hood I replaced and it made only the left hand lighter work. I found out the others are called auxiliary power and there is a spot in the fuse box under back seat for 'auxiliary power 1' it is in the #46 slot, and it is a 20 amp fuse. The one listed as cigarette lighter is 10 amp in #13 slot with the fuses under the hood. I am going right now to check the fuse in #46 slot in under the back seat fuses to see if it is blown and that is why not working, back in a min. Well it was blown and I replaced the 20 amp fuse with a new one, now all of the auxiliary power spots work! Yippee! The one on the right in front and the backseat one are both powered by one 20 amp fuse.in front and the one hope this helps unless you wanted to replace the whole lighter or auxillary power unit that will have to come from someone else. Sincerely, Elizane. Sorry more info than you needed oh well