I think I found the part #'s for you. Right side 55157460aa left side 55157461aa. Easy install as long as you already have rails. Just pop the top cover, unscrew the bolts, remove rails, put new ones on (bottom piece will be attached to rails don't worry about removing from old rails new ones will have the bottom piece attached) screw bolts back in then put top cover back on.
2011 Overland Summit
White Led's in fog lights, DRL, interior lights and both reverse lights.