That is what I am going to do whenever my 3.0's need to be rebuilt. I've heard the wait is rather long so be prepared to have something to put on your truck unless you can leave it parked for awhile.
Unfortunately ICON no longer rebuild shocks. I used someone on ICON's approved service centers and had issues, so mileage will vary.
I did have my front 3.0 shocks a year ago rebuilt by TPM Racing in San Antonio. Steve-O there was absolutely awesome and that would be the only other place I would trust other than the vendor but only because I personally have been there, met Steve-O and waited for the shocks to be rebuilt. He let me use his shop and tools to remove the shocks, he and another worker rebuilt them and then we put them back on all before the evening of Raptoberfest.