My 05 QC 4x4 does the same thing, and it's worse in cold weather. My squeek turned out to be the upper control arm bushings. One problem. When I checked about 6 months ago, you can't replace the upper control arm bushings. You have to replace the entire upper control arm and can only get it from Dodge for about $250 bucks!
Second, when I had to replace my sway-bar end links, they also were only from Dodge and were about $70 each. I replaced all my shocks with Ranchos, replaced both end links, and added the TM front end leveler kit. I can just live with the squeeky bushings.
Only suggestion would be to take the front wheels off, support the hubs, detach the upper control arm from the hub assembly, take it off and lube it with lithium grease. It might help or awhile.
