Front Suspension Issue

[bax467]

2005 GMC Sierra Excab z71 48k miles. Have a squeek in the front suspension, very constant especially at slow speeds. Can rock the truck back and forth by hand to replicate the squeek you hear going down the road. Dealer says it is lower shock mounts get loose. They dropped the lower arms and put lithium grease all over the lower shock mount before putting it all back together on both sides. Is there any sort of permanent fix? I've also heard an upper shock mount out of alignment can cause this sort of squeek. New shocks? New lower a-arms? bushings? Please help! I'm going crazy!