I have creaky seat post right now. Carbon bike frames transmit noise everywhere. You would think it to be the opposite but it isn't.
If you think it is a pivot then tear it down and grease all the pivots, bearings and bearing surfaces. You will have sealed bearings but a little grease on their mounting surface will do wonders.
Does it creak when your coasting? How about pedalling out of the saddle? If you stand beside the bike and side load your pedal, like your checking for triangle flex, does it creak then.
2014 JKU, JKS lift,Poison spyder flares, bombshell covers,Rancho D2 control arms, JKS adjustable track bars, 35" Tires. GrabBars, Crawler Conceptz rear bumper, Smitty front bumper, Winch. Rough Country inner fenders, Teraflex Disco Mud Flaps
Backseat Dobermann Security